何謂“入德之門”?

 What is So-called“ the Gateway 
   to the Virtue Realm of Sagehood?

學為聖賢：“入德之門” 及為學者進德修業次第的義理闡釋

Learning to Be a Sage: The “Gateway to the Virtue Realm of Sagehood ” and Its Neo-Confucian Exposition of the Sequence of Advancing in Virtue and Cultivating the Self

引言

“入德之門”，是北宋程顥、程頤兄弟在建構理學工夫論時，對《大學》一書價值的核心界定。這一界定的核心義涵，是將《大學》中所闡述的為學次序、修身工夫，視為儒家學者涉足道德實踐的必經門徑。從儒學發展的歷史脈絡看，二程的這一論斷並非簡單的文獻推崇，而是在漢唐儒學註疏傳統的基礎上，重新挖掘《大學》的工夫論價值，將其從《禮記》中的一篇獨立出來，作為對抗佛道二教心性修養理論、重構儒家成德之學的關鍵依據。南宋朱熹接續二程的學術思路，進一步做了系統化梳理：他重新編定《大學》文本次序，撰寫《大學章句》，將《大學》與《中庸》《論語》《孟子》合編為《四書》，確立了《大學》在儒家經典中的核心地位。朱熹完全認同二程對 “入德之門” 的定位，將這一範疇整合進完整的理學工夫論體系中，成為後世理解儒家道德修養的基礎性範式。 

Introduction

The “Gateway to the Virtue Realm of Sagehood ” is the core assessment of the value of the book The Great Learning made by the brothers Cheng Hao and Cheng Yi during the Northern Song dynasty as they constructed the Neo-Confucian theory of self-cultivation. The central meaning of this assessment is to regard the order of learning and the work of self-cultivation expounded in The Great Learning as the indispensable gateway through which Confucian scholars must enter moral practice. Seen from the historical development of Confucianism, this thesis of the Cheng brothers was not merely a recommendation of a text; rather, building on the exegetical tradition of Han and Tang Confucianism, they rediscovered the value of The Great Learning for self-cultivation theory, separated it from being merely one chapter in the Book of Rites, and used it as a crucial basis both for countering the mind-nature cultivation theories of Buddhism and Daoism and for reconstructing the Confucian learning of perfecting virtue. In the Southern Song, Zhu Xi carried forward the Cheng brothers’ line of thought and systematized it further: he re-edited the textual order of The Great Learning, wrote Commentary on the Great Learning in Chapters and Verses, and combined The Great Learning with The Doctrine of the Mean, The Analects, and The Mencius into the Four Books, thereby establishing the core position of The Great Learning among the Confucian classics. Zhu Xi fully endorsed the Cheng brothers’ designation of the “Gateway to the Virtue Realm of Sagehood ” and integrated this category into a complete Neo-Confucian system of self-cultivation theory, making it the foundational paradigm through which later generations understood Confucian moral cultivation.

在程朱理學的話語體系中，“聖賢” 是道德修養的最高目標，也是儒家學者畢生踐行的價值標準。如何抵達這一目標，工夫論的建構成為關鍵。在二程看來，不同於佛道二教追求 “遺世獨立” 的修行路徑，儒家的成德之學，必須是一個由日常實踐入手、步步推進、有本有源的完整進程，而 “入德之門” 正是這一進程的邏輯起始點。這個命題的理論意義，在於明確了儒家道德修養並非懸空討論心性，而是存在一個確定可循的下學上達路徑，這一路徑的文本依據正是《大學》。而《大學》中闡述的 “格物、致知、誠意、正心、修身、齊家、治國、平天下” 八條目，正是這一修養路徑的具體展開，這一整套由初學入門到成德達道的階梯結構，解決了學為聖賢的實踐路徑問題。 

Within the discourse of Cheng-Zhu Neo-Confucianism, the “sage” is the highest goal of moral cultivation and the standard of value that Confucian scholars practice throughout their lives. How to reach this goal makes the construction of a theory of self-cultivation crucial. In the view of the Cheng brothers, unlike the Buddhist and Daoist pursuit of a path of cultivation that “withdraws from the world and stands alone,” the Confucian learning of perfecting virtue must be a complete process that starts from daily practice, advances step by step, and possesses both roots and sources, and the “Gateway to the Virtue Realm of Sagehood ” is precisely the logical starting point of this process. The theoretical significance of this proposition lies in clarifying that Confucian moral cultivation is not an abstract discussion of mind and nature but that there exists a definite and followable path of “lower learning leading to higher understanding,” and the textual basis for this path is exactly The Great Learning. The “eight items” expounded in The Great Learning—investigation of things, extension of knowledge, making the will sincere, rectifying the mind, cultivating oneself, regulating the family, governing the state, and bringing peace to the world—are the concrete unfolding of this path of cultivation. This entire stepped structure, from the beginner’s entrance to the perfection of virtue and attainment of the Way, solves the problem of the practical path for learning to be a sage.

時至今日，理解 “入德之門” 的理論內涵，仍然必須以二程、朱熹的經典論述為核心依據。本文的闡釋原則，是嚴格以程朱原著原文為根本基準，以現代學界的相關學術研究為補充支撐，緊扣《大學》所提供的 “三綱領八條目” 的完整邏輯框架，從理論內涵、工夫方法、理論意義三個維度逐層展開解析，重點探究 “入德之門” 在整個儒家進德體系中的基礎地位，以及它如何通過格物致知等一系列次第工夫，將道德修養從初學入門逐步推擴到內聖外王的聖賢境界。這一研究路徑，既符合程朱本人對《大學》“入德之門” 的經典定位，也能準確把握儒家下學而上達、由切己實踐終至超越境界的修養特質。 

Even today, understanding the theoretical content of the “Gateway to the Virtue Realm of Sagehood ” must still be based on the classical expositions of the Cheng brothers and Zhu Xi. The hermeneutic principle of this paper is to take the original texts of the Cheng brothers and Zhu Xi as the fundamental benchmark, to use relevant modern scholarly research as supplementary support, and to adhere closely to the complete logical framework provided by the “three guiding principles and eight items” in The Great Learning. It analyzes the topic layer by layer from the three dimensions of theoretical content, methods of self-cultivation, and theoretical significance, focusing on exploring the foundational position of the “Gateway to the Virtue Realm of Sagehood ” within the whole Confucian system of advancing in virtue, and on how, through a series of sequential practices such as the investigation of things and extension of knowledge, it gradually extends moral cultivation from the beginner’s entrance to the sage-king realm of inner sageliness and outer kingliness. This line of inquiry not only conforms to the Cheng-Zhu classical definition of The Great Learning as the “Gateway to the Virtue Realm of Sagehood ,” but also accurately grasps the distinctive characteristic of Confucian cultivation—lower learning leading to higher understanding, and moving from personal, concrete practice to a realm of transcendence.

一、“入德之門” 的內涵：學為聖賢的入門徑路 

1. The Connotation of the “Gateway to the Virtue Realm of Sagehood ”: The Entry Path to Learning to Be a Sage

“入德之門” 的核心意涵，是指進入道德生命實踐的門徑、關口。在程朱理學的詮釋體系中，這一範疇並非對某種抽象道德原則的概括，而是對《大學》一書根本價值的界定，指向的是一條由初學切近實踐、步步推進至聖賢境界的確定路徑。理解這一命題的核心內涵，需要從其概念定義、經典依據和理論指向三個層面，把握其作為道德修養起點的規定性。 

The core meaning of the “Gateway to the Virtue Realm of Sagehood ” refers to the gateway or pass through which one enters the practice of moral life. Within the interpretive system of Cheng-Zhu Neo-Confucianism, this category is not a summary of some abstract moral principle, but a definition of the fundamental value of the book The Great Learning. It points to a definite path that proceeds from the beginner’s immediate practice, advances step by step, and reaches the realm of the sage. To understand the core content of this proposition, one must grasp, on three levels—its conceptual definition, its classical basis, and its theoretical direction—its determination as the starting point of moral cultivation.

1.1 “入德之門” 的概念界定 

1.1 The Conceptual Definition of the “Gateway to the Virtue Realm of Sagehood ”

從語義上看，“入德” 意為進入道德實踐的真實境域，擺脫自然生命狀態下氣質之性的局限，由普通人的自然存在狀態，轉化為具備自覺道德意識的主體；“門” 即門徑、樞紐，特指道德修養的起始關口，同時隱含着 “循此門徑，方能登堂入室” 的秩序性指向。在程朱的理論視域中，“入德之門” 並非泛指一般的道德修養方法，而是有着嚴格的經典限定，直接指向《大學》所闡述的為學次第。 

Semantically, “entering virtue” means entering the genuine realm of moral practice, casting off the limitations of the physical nature inherent in the natural state of life, and transforming from the ordinary natural existence of a human being into a subject equipped with conscious moral awareness. “Gate” means an entrance or pivotal point, specifically denoting the initial pass of moral cultivation, and at the same time implies the sequential orientation that “only by following this gate can one ascend the hall and enter the inner chamber.” In the theoretical perspective of the Cheng brothers and Zhu Xi, the “Gateway to the Virtue Realm of Sagehood ” does not refer to methods of moral cultivation in general; rather, it has a strict classical restriction, pointing directly to the order of learning set forth in The Great Learning.

二程首次明確將《大學》定性為 “入德之門”，提出 “《大學》，孔氏之遺書，而初學入德之門也”，將這一經典的核心價值錨定在道德實踐的起點之上。這一論斷的理論針對性，是批判當時學者為學缺乏確定的次第指引，茫然於成德的正確路徑。程頤曾在回答初學者如何為學時，明確指出：“入德之門，無如《大學》”，在他看來，《大學》的獨特價值，在於它保留了古人完整且循序漸進的為學次序，這是《論語》《孟子》等經典都無法替代的。學者只有經由《大學》的指引，才能走上正確的道德修養路徑，不至於走入歧途。 

The Cheng brothers were the first to explicitly characterize The Great Learning as the “Gateway to the Virtue Realm of Sagehood ,” stating that “The Great Learning is a surviving text of Confucius and serves as the gate through which beginners enter virtue,” thereby anchoring the core value of this classic at the very starting point of moral practice. The theoretical target of this thesis was to criticize scholars of the time for lacking a definite sequential guide in their learning and for being at a loss about the correct path to perfecting virtue. When answering a beginner’s question about how to pursue learning, Cheng Yi explicitly pointed out: “For the gate to enter virtue, nothing compares to The Great Learning.” In his view, the unique value of The Great Learning lay in its preservation of the ancients’ complete and step-by-step order of learning, something that even classics like The Analects and The Mencius could not replace. Only under the guidance of The Great Learning could a scholar embark on the correct path of moral cultivation and avoid going astray.

朱熹完全承襲了二程的這一論斷，並在《大學章句》的開篇註疏中，進一步強化了這一界定的權威性。他將二程的論斷作為《大學》一書的核心定性，明確指出，在《禮記》的眾多篇章中，唯有《大學》完整保留了古人循序漸進的為學次第，《論語》《孟子》都在其次；學者必須通過《大學》所提供的次第來修身向學，才能避免偏離正道。從程朱的整體表述來看，“入德之門” 這個概念，實質上包含着明確的雙重規定性：一是強調道德修養必須有確定的下學基礎，只能從初學者的切己實踐入手，不能空談性命、懸空立論；二是強調《大學》所提供的為學次序的唯一性，將其作為上達聖賢境界的必經不二路徑。 

Zhu Xi completely inherited this thesis of the Cheng brothers, and in the opening commentary of his Commentary on the Great Learning in Chapters and Verses, he further reinforced the authority of this definition. He took the Cheng brothers’ thesis as the core characterization of the book The Great Learning and explicitly pointed out that among the many chapters of the Book of Rites, only The Great Learning had completely preserved the ancients’ step-by-step order of learning, to which The Analects and The Mencius were secondary; a scholar had to cultivate himself and pursue learning through the sequence provided by The Great Learning in order to avoid deviating from the correct path. Judging from the overall presentation of the Cheng brothers and Zhu Xi, the concept of the “Gateway to the Virtue Realm of Sagehood ” essentially contains a clear twofold determination: first, it stresses that moral cultivation must have a definite foundation in lower learning and can only begin from the beginner’s personal, concrete practice; one must not engage in empty talk about human nature and destiny or build theories in a vacuum; second, it emphasizes the uniqueness of the order of learning provided by The Great Learning, making it the sole and necessary path for advancing to the realm of the sage.

1.2 “入德之門” 的經典依據：《大學》的為學次第 

1.2 The Classical Basis of the “Gateway to the Virtue Realm of Sagehood ”: The Order of Learning in The Great Learning

“入德之門” 的經典依據，是《大學》所闡述的 “三綱領”“八條目”。這一整套完整的價值和工夫架構，在程朱看來，是先秦儒家唯一保存完好的、邏輯清晰且循序漸進的為學次序，這是《大學》區別於其他儒家經典的獨特價值所在。 

The classical basis of the “Gateway to the Virtue Realm of Sagehood ” is the “three guiding principles” and the “eight items” expounded in The Great Learning. In the view of the Cheng brothers and Zhu Xi, this entire, complete structure of values and self-cultivation practice represents the only well-preserved, logically clear, and step-by-step order of learning from pre-Qin Confucianism. This is the unique value that distinguishes The Great Learning from other Confucian classics.

從文本結構上看，《大學》在先秦儒家典籍中獨一無二。它不像《論語》《孟子》那樣多是短章語錄、隨機對答，而是以一種 “形神皆聚” 的層層遞進邏輯，將道德修養的目標和實踐步驟系統化、條理化。《大學》開篇就提出 “大學之道，在明明德，在親民，在止於至善” 的三綱領，這是整個儒家進德之學的總目標，標定了道德修養從明復自身德性開始、到推己及人、最終達到至善境界的完整價值方向。三綱領的實現路徑，正是八條目所提供的具體實踐次第。《大學》對八條目做了明確的邏輯遞進表述，從 “格物” 開始，依次推進到 “致知”“誠意”“正心”“修身”“齊家”“治國”，最終抵達 “平天下”，形成了一個環環相扣、循序漸進的完整鏈條。這種嚴格的邏輯遞進結構，在先秦多為 “形散” 短章的典籍中極為罕見。這也是二程、朱熹將《大學》視為 “入德之門” 的重要原因：它提供了一個步驟清晰、可落地、可遵循的修養施工圖，為學者指明了一條可從初學起步、最終通達超越目標的實踐路徑。 

In terms of textual structure, The Great Learning is unique among pre-Qin Confucian texts. Unlike The Analects and The Mencius, which largely consist of short sayings and offhand dialogues, it employs a progressive logic in which “both form and spirit are gathered,” systematizing and structuring the goals and practical steps of moral cultivation. Right at its opening, The Great Learning presents the three guiding principles: “The way of great learning lies in manifesting one’s illustrious virtue, in loving the people, and in resting in the highest good.” These are the overall goal of the entire Confucian learning of advancing in virtue, marking the complete value orientation that starts from manifesting and recovering one’s own virtue, extends to others, and ultimately reaches the realm of the highest good. The path for realizing the three guiding principles is precisely the concrete sequence of practice provided by the eight items. The Great Learning explicitly expresses the eight items in a clear logical progression: beginning with the “investigation of things,” it proceeds in sequence to “extension of knowledge,” “making the will sincere,” “rectifying the mind,” “cultivating oneself,” “regulating the family,” “governing the state,” and finally reaches “bringing peace to the world,” forming a complete chain that is interlocking and step-by-step. Such a strict, logically progressive structure is extremely rare among pre-Qin texts that mostly consist of scattered short chapters. This is also an important reason why the Cheng brothers and Zhu Xi regarded The Great Learning as the “Gateway to the Virtue Realm of Sagehood ”: it supplies a clear, practicable, and followable blueprint for cultivation, pointing out a path of practice by which a scholar can begin as a beginner and eventually reach the transcendent goal.

二程的貢獻，是從義理層面發掘出《大學》的這一獨特價值，將其從《禮記》中獨立出來，作為 “四書” 體系的核心綱領，與《論語》《孟子》《中庸》形成由淺入深、彼此配合的完整為學序列。朱熹則進一步完成了《大學》文本的經典化重構。他認為，《大學》的舊本存在錯簡、脫漏的問題，因此在二程編定的文本基礎上，重新加以校勘整理，劃分章節，撰寫《大學章句》，還專門補充了 “格物致知” 的一章闕文。由此，朱熹將《大學》的文本體系和義理詮釋完全系統化，將其塑造為 “四書” 體系的綱領性文獻，標定了它在儒家經典中作為道德修養基礎典籍的特殊地位。 

The contribution of the Cheng brothers was to bring out this unique value of The Great Learning at the level of philosophical principles, separating it from the Book of Rites and making it the core program of the “Four Books” system, forming, together with The Analects, The Mencius, and The Doctrine of the Mean, a complete learning sequence that progresses from the shallow to the deep and in which each part coordinates with the others. Zhu Xi further completed the canonical reconstruction of the text of The Great Learning. He believed that the old version of The Great Learning suffered from misplaced bamboo slips and omissions; therefore, on the basis of the text edited by the Cheng brothers, he re-collated and re-arranged it, divided it into chapters, wrote Commentary on the Great Learning in Chapters and Verses, and even specially supplemented a missing chapter on the “investigation of things and extension of knowledge.” In doing so, Zhu Xi completely systematized the textual organization and the philosophical interpretation of The Great Learning, shaping it into the programmatic document of the “Four Books” system and marking its special position among the Confucian classics as the foundational text for moral cultivation.

在程朱看來，《大學》的為學次序，是一個由淺入深、由基礎到終極、不可隨意顛倒的完整序列，完美契合了道德修養由初學入門到成德達道的進程邏輯。這正是二程將其稱為 “入德之門” 的根本原因：它不僅提出了明確的道德修養目標，更提供了實現這一目標的唯一可行的實踐路徑；學者只有遵循《大學》的次序用功，才能真正踏上成德之學的正道。 

In the view of the Cheng brothers and Zhu Xi, the order of learning in The Great Learning is a complete sequence that proceeds from the shallow to the deep and from the foundation to the ultimate end, and its order cannot be arbitrarily reversed; it perfectly matches the process-logic of moral cultivation, from the beginner’s entrance to the perfection of virtue and the attainment of the Way. This is the fundamental reason why the Cheng brothers called it the “Gateway to the Virtue Realm of Sagehood ”: it not only sets out a clear goal for moral cultivation, but also provides the only feasible path of practice for realizing that goal. Only by devoting one’s efforts according to the sequence of The Great Learning can a scholar truly set foot on the correct path of the learning of perfecting virtue.

1.3 “入德之門” 的理論指向：由自然生命到道德生命的跨越 

1.3 The Theoretical Direction of the “Gateway to the Virtue Realm of Sagehood ”: The Leap from Natural Life to Moral Life

程朱理學的道德修養論，以 “學為聖賢” 為最高目標。“入德之門” 作為道德修養的起點，其理論指向是一個質的跨越：由自然生命的存在狀態，跨進到道德生命的實踐狀態。這一跨越，是理解程朱理學工夫論的關鍵邏輯，框定了整個儒家成德之學的基本方向。 

The moral cultivation theory of Cheng-Zhu Neo-Confucianism takes “learning to be a sage” as its highest goal. As the starting point of moral cultivation, the “Gateway to the Virtue Realm of Sagehood ” points theoretically toward a qualitative leap: from the existential state of natural life to the practical state of moral life. This leap is the key logic for understanding the Cheng-Zhu theory of self-cultivation and frames the basic direction of the entire Confucian learning of perfecting virtue.

在程朱的理論體系中，人性分為 “天地之性” 與 “氣質之性”。每個人都與生俱來具備天賦的 “天地之性”，即《大學》所說的 “明德”，這是道德生命的存在論基礎。但現實中的人，因為受到氣質之性的偏雜蒙蔽，又受到外在慾望的擾亂，原本純善的天地之性無法得到完全彰顯，所以長期處於一種缺乏自覺道德意識、放任自然情慾的自然生命狀態。道德修養的根本目標，就是通過切己的實踐工夫，變化氣質，去除氣質之性帶來的蒙蔽障礙，明復自身本然的 “天地之性”，然後將這種德性向外推擴，最終成為符合儒家理想人格的聖賢。而 “入德之門” 的意義，正是開啟這一實踐進程的關鍵起點，指引人從茫然無覺的自然生命狀態中清醒過來，開始自覺地進行道德實踐，完成兩種生命狀態的跨越。 

In the theoretical system of the Cheng brothers and Zhu Xi, human nature is divided into “the nature of Heaven and Earth” and “the physical nature.” Every person is innately endowed with the “nature of Heaven and Earth,” which is the “illustrious virtue” spoken of in The Great Learning; this is the ontological foundation of moral life. However, because actual human beings are obscured by the partiality and impurity of their physical nature and disturbed by external desires, the originally pure and good nature of Heaven and Earth cannot be fully manifested. Hence, they remain for a long time in a natural life state that lacks conscious moral awareness and indulges natural passions. The fundamental goal of moral cultivation is, through personal, concrete practice, to transform one’s physical endowment, remove the obstructions brought by the physical nature, manifest and recover one’s original “nature of Heaven and Earth,” and then extend this virtue outward, finally becoming a sage who conforms to the Confucian ideal personality. The significance of the “Gateway to the Virtue Realm of Sagehood ” is precisely to serve as the key starting point that opens this process of practice, guiding a person to awaken from the oblivious state of natural life, to begin conscious moral practice, and to complete the leap between these two states of life.

這一跨越的實踐邏輯，是由 “內聖” 而 “外王”。這是儒家道德修養的根本路徑，也是 “入德之門” 所指向的修養次第的核心邏輯。這一邏輯由《大學》的八條目清晰呈現：格物、致知、誠意、正心四目，指向的是個體內心的修養，是明復天地之性的內聖工夫；齊家、治國、平天下三目，指向的是個體德性向外的推擴，是將內在德性轉化為社會政治實踐的外王工夫；而修身，是聯結內聖工夫和外王工夫的樞紐環節，既是內聖工夫的終極完成，也是外王工夫的起點基礎。 

The practical logic of this leap is from “inner sageliness” to “outer kingliness.” This is the fundamental path of Confucian moral cultivation and also the core logic of the cultivation sequence to which the “Gateway to the Virtue Realm of Sagehood ” points. This logic is clearly presented by the eight items of The Great Learning: the four items of investigating things, extending knowledge, making the will sincere, and rectifying the mind point to the cultivation of the individual’s inner self—they are the inner-sage practice of manifesting and recovering the nature of Heaven and Earth; the three items of regulating the family, governing the state, and bringing peace to the world point to the outward extension of individual virtue—they are the outer-king practice of transforming inner virtue into social and political practice; and cultivating oneself is the pivotal link connecting the inner-sage and outer-king practices, being both the ultimate completion of the inner-sage practice and the starting-point and foundation for the outer-king practice.

通過這一邏輯，“入德之門” 就不是一個孤立的起點概念，而是內嵌於一個完整的價值鏈條之中的基礎環節：它以《大學》的三綱領為總目標，以八條目為具體實踐路徑，從格物致知入手，經由誠意、正心、修身的內省實踐，再將內在德性推擴於齊家、治國、平天下的外在事功，從而實現完整的聖賢人格理想。這一完整的價值鏈條，正是 “入德之門” 作為道德修養起點的理論指向。 

Through this logic, the “Gateway to the Virtue Realm of Sagehood ” is not an isolated concept of a starting point, but a foundational link embedded within a complete chain of values: it takes the three guiding principles of The Great Learning as its overall goal, and the eight items as its concrete path of practice; starting from the investigation of things and extension of knowledge, passing through the inner reflective practices of making the will sincere, rectifying the mind, and cultivating oneself, it then extends inner virtue to the outer accomplishments of regulating the family, governing the state, and bringing peace to the world, thereby realizing the complete ideal of the sage personality. This entire chain of values is exactly the theoretical direction of the “Gateway to the Virtue Realm of Sagehood ” as the starting point of moral cultivation.

二、“入德之門” 的工夫：進德修業的次第功夫 

2. The Practice of the “Gateway to the Virtue Realm of Sagehood ”: The Sequential Work of Advancing in Virtue and Cultivating the Self

“入德之門” 並非單純的理論概念，更指向具體的、可操作的道德實踐方法。程朱理學的工夫論，以《大學》的八條目為核心框架，構建起一個由初學入手、層層遞進、終成聖德的完整進德序列。理解這一工夫體系，需要把握格物致知、誠意正心、修身齊家治國平天下三個層級的實踐次第，理解它們之間先後有序、不可逾越的邏輯關係。 

The “Gateway to the Virtue Realm of Sagehood ” is not merely a theoretical concept; it points even more toward concrete, practicable methods of moral practice. The self-cultivation theory of Cheng-Zhu Neo-Confucianism takes the eight items of The Great Learning as its core framework and constructs a complete sequence for advancing in virtue that starts with the beginner, proceeds step by step through ascending levels, and finally perfects sage virtue. To understand this system of practice, one must grasp the three levels of practical sequence—the investigation of things and extension of knowledge; making the will sincere and rectifying the mind; and cultivating oneself, regulating the family, governing the state, and bringing peace to the world—and understand the logical relationship among them, which is orderly in sequence and cannot be transgressed.

2.1 入門之始：格物致知與主敬涵養 

2.1 The Beginning of Entering the Gate: The Investigation of Things and Extension of Knowledge, and Holding Fast to Reverence and Inner Cultivation

“入德之門” 的下手工夫，可從兩個維度進行理解 —— 這也是程朱理學工夫論的核心結構：一是 “入道” 維度的格物致知，二是 “成德” 維度的主敬涵養。二者不可偏廢，相輔而行，共同構成初學階段進德的基礎下手工夫。 

The initial work for entering the “Gateway to the Virtue Realm of Sagehood ” can be understood from two dimensions—this is also the core structure of the Cheng-Zhu theory of self-cultivation: one is the investigation of things and extension of knowledge, belonging to the dimension of “entering the Way”; the other is holding fast to reverence and inner cultivation, belonging to the dimension of “perfecting virtue.” The two must not be neglected; they complement each other and together constitute the foundational, initial work for advancing in virtue at the beginner’s stage.

程頤有一句名言：“涵養須用敬，進學則在致知”，這兩句話被朱熹視為整個工夫論的綱領，認為 “兩言雖約，其實入德之門無逾於此”。在程朱看來，這兩項工夫，是學者由初學而入道德實踐領域的唯一正確路徑。其中，格物致知屬於 “進學” 的認知層面工夫，是 “入道” 維度的第一義；主敬涵養屬於 “涵養” 的存養層面工夫，是 “成德” 維度的第一義。二者在理論邏輯上有先後，在實踐過程中卻需要互相發明、並進發展，共同支撐道德修養的基礎進程。 

Cheng Yi famously stated: “For inner cultivation, one must use reverence; for advancing in learning, it lies in the extension of knowledge.” Zhu Xi regarded these two sentences as the guiding program of the entire theory of self-cultivation, believing that “though these two sayings are concise, in truth, the Gateway to the Virtue Realm of Sagehood  is nothing other than this.” In the view of the Cheng brothers and Zhu Xi, these two items of practice are the sole correct path for a scholar to pass from beginner’s learning into the domain of moral practice. Among them, the investigation of things and extension of knowledge belongs to the cognitive-level practice of “advancing in learning” and is the primary meaning in the dimension of “entering the Way”; holding fast to reverence and inner cultivation belongs to the preserving and nurturing practice of “inner cultivation” and is the primary meaning in the dimension of “perfecting virtue.” The two have a sequential order in theoretical logic, but in the actual process of practice they must illuminate each other and develop in tandem, together supporting the foundational course of moral cultivation.

2.1.1 格物致知：入道維度的第一義 

2.1.1 The Investigation of Things and Extension of Knowledge: The Primary Meaning in the Dimension of Entering the Way

從 “入道” 的維度看，格物致知是程朱理學為 “入德之門” 設定的開端工夫，是道德修養的認知前提。朱熹在《大學章句》中，嚴格遵照《大學》的文本邏輯，將格物致知作為整個修養次第的起點；在他補充的《大學》“格物致知” 傳文中，對這一工夫的內涵做了詳盡闡釋，將其定為學者進入道德實踐領域的第一步。 

From the dimension of “entering the Way,” the investigation of things and extension of knowledge is the initial practice that Cheng-Zhu Neo-Confucianism establishes for the “Gateway to the Virtue Realm of Sagehood ,” and is the cognitive prerequisite for moral cultivation. In his Commentary on the Great Learning in Chapters and Verses, Zhu Xi strictly followed the textual logic of The Great Learning and made the investigation of things and extension of knowledge the starting point of the entire cultivation sequence. In the supplementary commentary on “the investigation of things and extension of knowledge” that he added to The Great Learning, he provided a detailed exposition of the content of this practice and designated it as the first step for the scholar entering the domain of moral practice.

朱熹的 “格物致知” 說，包含着嚴密的理論邏輯，是其理學體系中 “即物窮理” 原則的直接落地。他在《大學章句》中注釋說：“致，推極也；知，猶識也。推極吾之知識，欲其所知無不盡也。格者，至也；物，猶事也。窮至事物之理，欲其極處無不到也。” 在朱熹看來，人心本然具備認知天理的能力，天下萬事萬物也都包涵着天理；但因為人受到氣質之性的局限，對天理的認知存在很多未盡不明的地方。因此，格物致知的實質，就是要求學者即凡天下之物，都立足於已知的天理，不斷去窮盡每個事物的道理，日積月累，一旦豁然貫通，就能抵達對事物的表裡精粗、對內心的全體大用都完全理解的境界。到了這種境界，人心就能完全認知本然的善性，道德修養的方向也就徹底明了了。 

Zhu Xi’s theory of “the investigation of things and extension of knowledge” contains a strict theoretical logic and is a direct implementation of the principle of “exhausting principles by coming into contact with things” in his Neo-Confucian system. He commented in his Commentary on the Great Learning: “‘Extension’ means pushing to the limit; ‘knowledge’ is like recognition. Pushing our knowledge to the limit means wanting what we know to be exhaustive. ‘Investigation’ means to arrive; ‘things’ are like affairs. Exhaustively arriving at the principles of things means wanting to reach their ultimate point without anything left unattended.” In Zhu Xi’s view, the human mind inherently possesses the capacity to cognize heavenly principle, and all the myriad things and affairs under heaven also embody heavenly principle; yet because human beings are limited by their physical nature, their cognition of heavenly principle harbors many places where they have not yet fully grasped and understood it. Hence, the substance of the investigation of things and extension of knowledge requires the scholar to approach all things under heaven, basing himself on the heavenly principle already known, and to unceasingly exhaust the principle of each thing, accumulating over days and months, until at a certain point a sudden breakthrough and comprehension is achieved, reaching a state in which the external and internal, the coarse and the subtle of things, and the complete substance and great functioning of the mind are all fully understood. Once this state is reached, the human mind can fully cognize the original good nature, and the direction of moral cultivation becomes thoroughly clear.

朱熹之所以將格物致知作為入德的起點，是基於他的理論認知：道德實踐的基礎，是先能明曉道德的道理；如果不通過格物致知來窮究事物的天理，連道德的內涵、標準和實踐路徑都無法明確，後續的一切修養工夫都會失去明確的方向，也就無從開展。因此，格物致知是整個道德修養進程的第一步，也是必須的認知基礎。 

The reason Zhu Xi placed the investigation of things and extension of knowledge at the very beginning of entering virtue is based on his theoretical understanding that the foundation of moral practice is first to be able to clearly understand the principles of morality; if one does not, through investigating things and extending knowledge, exhaustively inquire into the heavenly principle in things, then even the content, standards, and practice-path of morality cannot be made clear, and all subsequent cultivation efforts will lose their clear direction and will have no way to proceed. Therefore, the investigation of things and extension of knowledge is the first step of the entire process of moral cultivation, and is its indispensable cognitive foundation.

2.1.2 主敬涵養：成德維度的第一義 

2.1.2 Holding Fast to Reverence and Inner Cultivation: The Primary Meaning in the Dimension of Perfecting Virtue

在程朱的工夫論體系中，格物致知並非獨立完成道德修養進程的工夫。學者通過格物致知明曉了道理，還需要主敬涵養的工夫，才能將認知層面的道理轉化為自身真實的德性生命；若缺少這一環節，格物致知所得的道理，就僅僅是一種懸空的認知知識，而無法轉化為真實的道德實踐。 

In the Cheng-Zhu system of self-cultivation theory, the investigation of things and extension of knowledge is not a practice that independently completes the process of moral cultivation. After a scholar has understood the principles through investigating things and extending knowledge, he still needs the practice of holding fast to reverence and inner cultivation in order to transform the principles at the cognitive level into his own genuine life of virtue; if this link is missing, the principles gained from investigating things and extending knowledge remain merely abstract cognitive knowledge and cannot be transformed into real moral practice.

從 “成德” 的維度看，主敬涵養是將格物致知獲得的道德認知，轉化為真實的道德生命的關鍵工夫。程頤提出 “入道莫如敬，未有能致知而不在敬者”，已經指出了 “敬” 在修身工夫中的基礎作用。朱熹進一步發展了這一思想，將 “敬” 界定為 “主一無適”，即精神集中、專一於天理，不放縱情慾、不散亂精神；他甚至將 “敬” 貫穿於小學和大學的整個修養進程，認為 “敬” 是格物致知得以有效開展的前提 —— 如果沒有 “敬” 來收斂身心，維持內心的專一集中，格物致知就無法取得真實有效的效果；同時，“敬” 也是將格物致知所獲得的天理，存養熟化為自身德性的橋樑。只有以 “敬” 為統領，才能在格物致知的前後，都保持一種警醒、收斂、不放縱、無散亂的狀態，使道德認知與道德實踐相互促進，共同提升。 

From the dimension of “perfecting virtue,” holding fast to reverence and inner cultivation is the crucial practice that transforms the moral cognition obtained through investigating things and extending knowledge into a genuine moral life. Cheng Yi stated that “for entering the Way, nothing compares to reverence; there has never been one who could extend knowledge without abiding in reverence,” already pointing out the foundational role of “reverence” in the practice of self-cultivation. Zhu Xi further developed this thought, defining “reverence” as “abiding in one thing and not shifting,” meaning concentrating the spirit and focusing solely on heavenly principle, without indulging passions and desires or scattering the mind. He even threaded “reverence” through the entire cultivation process from elementary learning to great learning, holding that “reverence” is the prerequisite that enables the investigation of things and extension of knowledge to be carried out effectively—if one does not use reverence to gather in body and mind and maintain inner concentration, the investigation of things and extension of knowledge cannot achieve real and effective results. At the same time, “reverence” is also the bridge that preserves, nurtures, and ripens the heavenly principle obtained from investigating things and extending knowledge into one’s own virtue. Only by taking “reverence” as the guiding thread can one maintain, both before and after the investigation of things and extension of knowledge, a state that is alert, gathered in, free from indulgence, and free from mental scattering, so that moral cognition and moral practice mutually propel and enhance each other.

在具體的實踐中，格物致知與主敬涵養並非截然分開、階段性推進的，而是 “互相發明”、並行並進的。朱熹用 “車兩輪”“鳥兩翼” 來比喻二者的緊密關係：格物致知越透徹，主敬涵養的目標就越清晰、越深入；主敬涵養越成熟，格物致知的效果就越真切、越紮實，二者交相為用，共同支撐起道德修養的起始進程。這正是程朱用這兩項工夫作為 “入德之門” 基礎路徑的根本原因：它同時兼顧了道德認知和道德實踐兩個層面，實現了知與行的雙重統一。 

In concrete practice, the investigation of things and extension of knowledge and holding fast to reverence and inner cultivation are not separated into distinct, phased stages, but “mutually illuminate each other” and advance in parallel. Zhu Xi used the metaphors of a cart’s two wheels and a bird’s two wings to describe their close relationship: the more thoroughly one investigates things and extends knowledge, the clearer and more profound the goal of holding fast to reverence and inner cultivation becomes; the more mature one’s holding fast to reverence and inner cultivation becomes, the more genuine and solid the results of investigating things and extending knowledge will be. The two function in concert, jointly supporting the initial course of moral cultivation. This is exactly the fundamental reason why the Cheng brothers and Zhu Xi employed these two practices as the foundational path of the “Gateway to the Virtue Realm of Sagehood ”: it simultaneously attends to the two dimensions of moral cognition and moral practice, realizing a twofold unity of knowledge and action.

2.2 入德之進：誠意正心 

2.2 Progressing in Entering Virtue: Making the Will Sincere and Rectifying the Mind

通過格物致知與主敬涵養的基礎工夫，學者明曉了道德的道理，建立了道德認知的初步根基，接下來就需要進入 “誠意正心” 的修持環節。這一環節是連接外在格物致知與內在心性修養的關鍵節點，是將外在的道德認知轉化為內在真實德性的進階工夫，在整個八條目次第中，承擔著 “內聖之樞” 的重要作用。 

After establishing the initial foundation of moral cognition through the foundational practices of investigating things and extending knowledge and holding fast to reverence and inner cultivation, the scholar understands the principles of morality and must then enter the cultivation stage of “making the will sincere and rectifying the mind.” This stage is the crucial node that links the outward investigation of things and extension of knowledge with the inner cultivation of mind and nature; it is the advanced practice that transforms external moral cognition into inner, genuine virtue. Within the entire sequence of the eight items, it plays the important role of “the pivot of inner sageliness.”

《大學》對誠意正心的內涵做了明確界定，朱熹在《大學章句》中做了深入闡釋，點明了這兩項工夫對匡正心性的意義。所謂 “誠意”，就是要做到不自欺，讓內心的真實意念符合明曉的道理，就像厭惡惡臭、喜好美色那樣，是一種發自內心的真實自覺；而 “正心”，則是要做到不被忿懥、恐懼、好樂、憂患等個人情感所左右，保持內心的中正平衡，讓天理在心中處於主導地位。 

The Great Learning clearly defines the content of making the will sincere and rectifying the mind, and Zhu Xi, in his Commentary on the Great Learning in Chapters and Verses, offered an in-depth exposition, pointing out the significance of these two practices for correcting the mind and nature. “Making the will sincere” means not deceiving oneself, ensuring that the genuine intentions of the heart conform to the understood principles, just as one naturally hates foul odors and loves beautiful colors—it is a genuine, spontaneous self-awareness arising from within. “Rectifying the mind” means not allowing one’s mind to be swayed by personal emotions such as anger, fear, fondness, and anxiety, thereby maintaining inner centeredness and balance and allowing heavenly principle to hold a dominant position in the mind.

從工夫論的邏輯來看，誠意正心，實質上是在格物致知的基礎上，對內心世界的進一步修鍊和匡正，是由外向內貫通的關鍵環節。格物致知是向外窮理，而誠意正心則是向內用功，將通過格物致知獲得的天理貫徹到心識的每一個角落，做到表裡如一、真實無妄。這一環節，決定了道德修養能否建立在堅實的基礎之上，能否避免 “知而不行” 的虛假困境：如果僅有格物致知的認知，卻沒有誠意正心的內化工夫，道德認知就只是一種外在的知識，無法轉化為真實的道德實踐。 

From the logic of the theory of self-cultivation, making the will sincere and rectifying the mind is essentially a further training and correction of the inner world on the foundation of investigating things and extending knowledge; it is the key link that connects from the outside to the inside. Investigating things and extending knowledge is directed outward to exhaust principles, while making the will sincere and rectifying the mind applies effort inwardly, carrying the heavenly principle obtained through investigating things and extending knowledge through to every corner of the mind and consciousness, so as to achieve consistency between the inner and outer and truthfulness without falsity. This link determines whether moral cultivation can be built on a solid foundation and whether it can avoid the false predicament of “knowing but not acting”: if one only has the cognition from investigating things and extending knowledge but lacks the inner transformative practice of making the will sincere and rectifying the mind, moral cognition remains merely external knowledge and cannot be transformed into genuine moral practice.

從整個修養的次第進程來看，誠意正心的地位也極為關鍵。《大學》的八條目，以修身為界，分為 “內聖” 和 “外王” 兩個部分：格物致知是內聖工夫的基礎，誠意正心是內聖工夫的推進深化，修身是內聖工夫的終極完成；而齊家、治國、平天下，則是內聖德性向外推擴的外王工夫。誠意正心，正好處於這兩個部分的中間銜接位置 —— 它上承格物致知所明曉的天理，下啟修身齊家的道德實踐，將向外的認知和向內的存養貫通為一體，是整個內聖工夫中，將道理內化於心的關鍵一環。 

From the perspective of the entire sequential process of cultivation, the position of making the will sincere and rectifying the mind is also extremely crucial. The eight items of The Great Learning, with cultivating oneself as the boundary, are divided into two parts—“inner sageliness” and “outer kingliness”: the investigation of things and extension of knowledge are the foundation of the inner-sage practice; making the will sincere and rectifying the mind are the advance and deepening of the inner-sage practice; cultivating oneself is the ultimate completion of the inner-sage practice; while regulating the family, governing the state, and bringing peace to the world are the outer-king practice of extending inner sagely virtue outward. Making the will sincere and rectifying the mind lies precisely at the intermediate juncture of these two parts—it carries on from the heavenly principle clarified through the investigation of things and extension of knowledge and opens the way to the moral practice of cultivating oneself and regulating the family, linking outward cognition and inner nurturing into a single whole. It is the crucial link within the whole inner-sage practice by which principle is internalized in the mind.

這一環節的重要價值，還在於它明確了儒家道德修養的嚴格標準：必須從心性層面入手，做到表裡如一、真實無妄；僅僅依靠外在的格物致知，無法真正成就德性；只有在誠意正心的基礎上，才能繼續推進修身、齊家、治國、平天下的外王工夫。 

The important value of this stage also lies in its clarification of the strict standard of Confucian moral cultivation: one must begin at the level of mind and nature, achieving consistency between inner and outer and truthfulness without falsity. Relying only on the outward investigation of things and extension of knowledge cannot truly perfect virtue; only on the foundation of making the will sincere and rectifying the mind can one continue to advance to the outer-king practices of cultivating oneself, regulating the family, governing the state, and bringing peace to the world.

2.3 成德之推：修身齊家治國平天下 

2.3 The Extension of Perfecting Virtue: Cultivating Oneself, Regulating the Family, Governing the State, and Bringing Peace to the World

經過誠意正心的內在修持，個體的道德修養已經達到一定的境界，但這並非儒家道德修養的終極目標。儒家的理想，是將內在的德性向外推擴，在社會人倫和政治實踐中驗證德性、完善德性。因此，“入德之門” 的完整實踐路徑，必然以修身作為樞紐環節，進一步貫通外王層面的齊家、治國、平天下工夫，實現內聖外王的統一。 

After the inner cultivation of making the will sincere and rectifying the mind, the individual’s moral cultivation has reached a certain level, but this is not the ultimate goal of Confucian moral cultivation. The Confucian ideal is to extend inner virtue outward, to verify and perfect virtue in social relationships and political practice. Therefore, the complete practical path of the “Gateway to the Virtue Realm of Sagehood ” necessarily takes cultivating oneself as the pivotal link and further extends to the outer-king practices of regulating the family, governing the state, and bringing peace to the world, thereby realizing the unity of inner sageliness and outer kingliness.

2.3.1 修身：聯結內聖與外王的樞紐 

2.3.1 Cultivating Oneself: The Pivot Linking Inner Sageliness and Outer Kingliness

在《大學》的八條目中，修身居於核心樞紐的地位，是整個儒家進德次第的中心環節。《大學》對此有明確的總結性表述：“自天子以至於庶人，壹是皆以修身為本。” 朱熹在《大學章句》中反覆強調，修身是根本的基礎環節，前面的格物、致知、誠意、正心，都是為了完成修身的內在前提；而後面的齊家、治國、平天下，則是修身的外在效果；如果修身的根本環節出現問題，後面的所有實踐都不可能取得真正的成功。 

Among the eight items of The Great Learning, cultivating oneself occupies the central, pivotal position and is the core link in the entire Confucian sequence of advancing in virtue. The Great Learning has a clear, summative statement on this: “From the Son of Heaven down to the common people, all without exception take cultivating oneself as the root.” In his Commentary on the Great Learning in Chapters and Verses, Zhu Xi repeatedly stressed that cultivating oneself is the fundamental and foundational link. The preceding items—the investigation of things, the extension of knowledge, making the will sincere, and rectifying the mind—all serve as the inner prerequisites for completing cultivating oneself; the subsequent items—regulating the family, governing the state, and bringing peace to the world—are the outer effects of cultivating oneself. If a problem occurs in the root link of cultivating oneself, none of the subsequent practices can truly succeed.

從邏輯內涵上看，修身這一工夫，是對前四目 “格致誠正” 的整體整合與最終完成。格物、致知、誠意、正心，分別從認知、存養、意念、心智四個層面，為修身提供了必要的基礎條件；但這四項目標，必須通過修身的實踐才能完全整合落地，將分散的工夫凝結為完整的、穩定的道德人格。只有完成了修身的工夫，內在的德性才算真正建立起來，具備了向外推擴、轉化為外在事功的基礎。 

From the perspective of its logical content, the practice of cultivating oneself is the overall integration and final completion of the preceding four items: investigating things, extending knowledge, making the will sincere, and rectifying the mind. These four provide the necessary foundational conditions for cultivating oneself from the four dimensions of cognition, nurturing, intention, and mental state respectively; but these four aims can only be fully integrated and realized through the practice of cultivating oneself, coalescing the dispersed efforts into a complete and stable moral personality. Only when the practice of cultivating oneself is completed can inner virtue truly be established, providing the foundation for extending it outward and transforming it into outer accomplishments.

2.3.2 齊家、治國、平天下：德性的向外推擴 

2.3.2 Regulating the Family, Governing the State, and Bringing Peace to the World: The Outward Extension of Virtue

在程朱的理論體系中，修身的完成並非道德修養的終點。儒家之所以將修身作為根本基礎，其本意是由己及人、由內向外，將個體的德性逐步推擴到家庭、國家，乃至天下全境。這一完整的向外推擴過程，就是齊家、治國、平天下的外王工夫。這是一個步步推進、層層擴展的完整序列，有嚴格的先後順序，不可逾越、不可顛倒。 

In the theoretical system of the Cheng brothers and Zhu Xi, the completion of cultivating oneself is not the endpoint of moral cultivation. The fundamental reason why Confucianism takes cultivating oneself as the root foundation is precisely to extend from oneself to others and from the inner to the outer, gradually expanding the individual’s virtue to the family, the state, and ultimately to the whole world. This entire process of outward extension is precisely the outer-king practice of regulating the family, governing the state, and bringing peace to the world. It is a complete sequence that advances step by step and expands layer by layer, with a strict sequential order that cannot be transgressed or reversed.

“齊家”，是指整頓家族，用自己的德性去感化、規範家族成員，使家族內部的倫理關係都能達到理想的道德標準。這是個體德性向外推擴的第一步。在程朱看來，家庭是最基礎的社會單位，也是實踐道德的第一場所；一個人如果不能管好自己的家族，就不可能將德性向外推擴，更不可能影響、治理家族以外的社會人群。因此，齊家是聯結修身與治國的第一環節，是外王工夫的真實起點。 

“Regulating the family” means putting the family in order, using one’s virtue to transform and regulate family members, so that the ethical relationships within the family can all reach the ideal moral standard. This is the first step in extending individual virtue outward. In the view of the Cheng brothers and Zhu Xi, the family is the most basic unit of society and the first site for practicing morality. If a person cannot manage his own family well, he cannot possibly extend his virtue outward, much less influence and govern social groups beyond the family. Therefore, regulating the family is the first link connecting cultivating oneself with governing the state, and is the genuine starting point of outer-king practice.

“治國”，是齊家的進一步推擴，指治理國家，將個人的德性、齊家的倫理實踐，轉化為治理社會、管理國家的政治實踐。在程朱看來，家庭倫理是政治倫理的基礎，齊家的 “孝悌慈” 道德準則，可以直接轉化為治國的 “仁禮義” 政治原則；一個能盡孝悌於家族的人，才能將這種仁愛之心推擴到全社會，真正施行仁政，實現一國範圍內的道德教化。 

“Governing the state” is the further extension of regulating the family, referring to the governance of the state—transforming the individual’s virtue and the ethical practice of regulating the family into the political practice of governing society and managing the state. In the view of the Cheng brothers and Zhu Xi, family ethics is the foundation of political ethics; the moral standards of “filial piety, fraternal respect, and parental kindness” used in regulating the family can be directly transformed into the political principles of “humaneness, ritual propriety, and rightness” in governing the state. Only a person who can fulfill filial piety and fraternal respect within the family can extend this mind of humaneness and love to the whole society, truly implement humane governance, and realize moral transformation within the entire state.

“平天下”，是外王工夫的終極目標，也是整個儒家道德修養的終極境界。它是治國的進一步推擴，將德性的影響擴展到整個天下，實現全天下的道德教化，建立一個人人都能明其明德、各得其宜、無不平齊的理想社會。在程朱看來，這不是一種虛無縹緲的理想，而是可以通過一步步實踐達成的目標：只要經由格物致知、誠意正心、修身、齊家、治國的完整工夫，將德性的推擴不斷放大，日積月累，就能最終實現天下大同的仁道理想。 

“Bringing peace to the world” is the ultimate goal of the outer-king practice and also the ultimate realm of the entire Confucian moral cultivation. It is the further extension of governing the state, expanding the influence of virtue to the entire world, realizing moral transformation throughout all under heaven, and establishing an ideal society in which everyone can manifest their illustrious virtue, each obtains what is fitting, and nothing is unequal or unpeaceful. In the view of the Cheng brothers and Zhu Xi, this is not an illusory and ethereal ideal, but a goal that can be reached through step-by-step practice. As long as one passes through the complete practice of investigating things and extending knowledge, making the will sincere and rectifying the mind, cultivating oneself, regulating the family, and governing the state, and continuously amplifies the extension of virtue, over days and months of accumulation, one can ultimately realize the humane ideal of the Great Harmony of the world.

這一整套 “修身 — 齊家 — 治國 — 平天下” 的外王序列，緊密承接於內聖的格致誠正工夫，共同構成了《大學》八條目 “內聖外王” 的完整邏輯結構。在這一結構中，前四目是後四目的基礎，後四目是前四目的推擴和落地；沒有內聖的基礎，外王的推擴就失去了根本依據；而沒有外王的推擴，內聖的德性也無法得到充分驗證，二者緊密關聯，缺一不可。這也正是儒家道德修養區別於佛道修養的關鍵特質：它不是一種單純的個人心性修養，而是必須在家庭、社會、天下的實際人倫事務中，才能完成德性的完整實踐，最終成就 “博學而不窮，篤行而不倦” 的聖賢人格。 

This entire outer-king sequence of “cultivating oneself—regulating the family—governing the state—bringing peace to the world” closely follows from the inner-sage practices of investigating things, extending knowledge, making the will sincere, and rectifying the mind, and together they form the complete logical structure of “inner sageliness and outer kingliness” in the eight items of The Great Learning. In this structure, the first four items are the foundation for the last four, while the last four are the extension and realization of the first four. Without the foundation of inner sageliness, the extension of outer kingliness loses its fundamental basis; without the extension of outer kingliness, the virtue of inner sageliness cannot be fully verified. The two are closely linked and neither can be dispensed with. This is precisely the key characteristic that distinguishes Confucian moral cultivation from Buddhist and Daoist cultivation: it is not a purely personal cultivation of mind and nature, but must be carried out in the concrete human relationships and affairs of family, society, and the world in order to complete the full practice of virtue and ultimately achieve the sage personality of one who “learns broadly without ever stopping and practices earnestly without ever wearying.”

三、“入德之門” 的意義：下學而上達，至於聖人 

3. The Significance of the “Gateway to the Virtue Realm of Sagehood ”: Lower Learning Leads to Higher Understanding, Reaching the Sage

“入德之門” 的理論價值，在於它構建了一套完整的、可落地的道德修養路徑。從程朱的整體論述來看，這一範疇的核心意義，是指明了儒家道德修養由淺入深、由初級到終極、由切己實踐到超越境界的完整進程，將 “學為聖賢” 的目標與切實可行的下學工夫緊密聯結起來。 

The theoretical value of the “Gateway to the Virtue Realm of Sagehood ” lies in its construction of a complete and practicable path of moral cultivation. From the overall discussions of the Cheng brothers and Zhu Xi, the core significance of this category is that it points out the complete process of Confucian moral cultivation from the shallow to the deep, from the elementary to the ultimate, and from personal, concrete practice to the realm of transcendence, tightly linking the goal of “learning to be a sage” with the concrete, practicable work of lower learning.

3.1 下學而上達：貫通本末的修養秩序 

3.1 Lower Learning Leading to Higher Understanding: An Order of Cultivation That Connects Root and Branch

“入德之門” 的首要意義，是確立了 “下學而上達” 的儒家修養基本秩序。這一秩序的核心邏輯，是將道德修養的超越目標，錨定在日常的、切己的、切實的實踐基礎之上，指明了一條從切近處起步、循序漸進、逐步實現超越目標的可行路徑。 

The primary significance of the “Gateway to the Virtue Realm of Sagehood ” is that it establishes the fundamental Confucian order of cultivation expressed as “lower learning leads to higher understanding.” The core logic of this order is to anchor the transcendent goal of moral cultivation firmly upon the foundation of daily, personal, concrete practice, pointing out a viable path that begins from what is near at hand, proceeds step by step, and gradually realizes the transcendent goal.

所謂 “下學”，是指從日常的、切近的、基礎的道德實踐入手，這是 “入德之門” 的關鍵特質。在程朱的理論視域中，道德修養不能懸空立論，不能憑空追求高遠的超越目標，必須從格物致知、誠意正心、修身、齊家這些切近自我、觸手可得的日常實踐入手，一步一步積累基礎。《大學》的八條目，正是這樣一個由切近處入手、層層向上推進的完整 “下學” 序列：從格物致知的讀書窮理，到誠意正心的向內慎獨，再到修身、齊家的日常人倫實踐，都是學者可以直接下手、日日踐行的切己工夫；只有先在這些 “下學” 的切近實踐中紮實積累，才能完成向上的超越進程。 

“Lower learning” refers to beginning with daily, near-at-hand, and foundational moral practice; this is the key characteristic of the “Gateway to the Virtue Realm of Sagehood .” In the theoretical horizon of the Cheng brothers and Zhu Xi, moral cultivation cannot build its arguments in a vacuum or chase after lofty transcendent goals out of thin air; one must start from such near-at-hand, readily accessible daily practices as the investigation of things and extension of knowledge, making the will sincere and rectifying the mind, cultivating oneself, and regulating the family, accumulating a foundation step by step. The eight items of The Great Learning are precisely such a complete sequence of “lower learning” that begins from what is near and advances layer by layer upward: from reading and exhausting principles in the investigation of things and extension of knowledge, to inward vigilance in solitude in making the will sincere and rectifying the mind, to the daily ethical practice of cultivating oneself and regulating the family—all are personal, concrete practices that the scholar can directly undertake and carry out day after day. Only by first accumulating firmly in these near-at-hand practices of “lower learning” can one complete the upward process of transcendence.

所謂 “上達”，是指通過下學的不斷積累，逐步提升道德境界，最終通達聖賢的終極境界。這是一個由量變到質變的漸進過程，需要長期的實踐積累，不能一蹴而就，更不能越級躍進。在程朱看來，《大學》的八條目已經明確規劃了這一上達的具體路徑：由格物致知的入門工夫開始，經過誠意正心的內向修持，完成修身的內聖之功，再將德性逐步推擴到齊家、治國、平天下的外王事功，最終抵達與天理為一、明德於天下的聖賢終極境界。這一完整的階梯式進程，將 “下學” 的切己實踐，與 “上達” 的超越目標，緊密貫通為一體，確立了本末始終、先後有序的道德修養秩序。 

“Higher understanding” refers to gradually elevating one’s moral realm through the ceaseless accumulation of lower learning and finally reaching the ultimate realm of the sage. This is a gradual process from quantitative change to qualitative transformation; it requires long-term practical accumulation and cannot be achieved in a single leap, much less by skipping steps. In the view of the Cheng brothers and Zhu Xi, the eight items of The Great Learning have already clearly mapped out this concrete path of higher understanding: beginning with the initial practice of investigating things and extending knowledge, passing through the inward cultivation of making the will sincere and rectifying the mind, completing the inner-sage achievement of cultivating oneself, and then gradually extending virtue outward to the outer-king accomplishments of regulating the family, governing the state, and bringing peace to the world, finally arriving at the ultimate sage realm of being one with heavenly principle and manifesting illustrious virtue throughout the world. This complete, ladder-like process tightly links the personal, concrete practice of “lower learning” with the transcendent goal of “higher understanding” into a single whole, establishing an order of moral cultivation in which root and branch, beginning and end, and earlier and later are all properly ordered.

這一 “下學而上達” 的秩序，在理論上很好地解決了工夫與境界的辯證關係：超越的聖賢境界，不是憑空出現的，也不是通過某種神秘的 “頓悟” 瞬間達成的，而是必須通過日復一日、循序漸進的切己道德實踐，不斷積累、不斷提升，才能自然抵達；沒有下學的切己實踐，上達的超越目標就失去了落地的基礎。這正是儒家道德修養最顯著的特質：它不追求玄虛的、離世的修行體驗，而是主張在日常的現實人倫事務中，踐行切己的實踐工夫，逐步實現終極的超越目標。 

This order of “lower learning leading to higher understanding” theoretically resolves the dialectical relationship between practice and realm quite well: the transcendent realm of the sage does not appear out of thin air, nor is it attained instantaneously through some mysterious “sudden enlightenment”; it must be reached naturally through day-after-day, step-by-step personal moral practice, through unceasing accumulation and continuous elevation. Without the personal, concrete practice of lower learning, the transcendent goal of higher understanding loses its grounding and foundation. This is exactly the most distinctive characteristic of Confucian moral cultivation: it does not pursue mysterious and abstract experiences of world-renouncing cultivation, but insists on carrying out the personal, concrete practice within daily, real human relationships and affairs, gradually realizing the ultimate transcendent goal.

3.2 明分而異向：辨析儒釋道三家的修行路徑 

3.2 Clarifying Distinctions and Different Directions: Differentiating the Paths of Cultivation in Confucianism, Buddhism, and Daoism

“入德之門” 的另一重要理論意義，是為了對抗佛道二教的修行理論，明確劃分儒家與佛道二教在修行目標、方法和價值取向上的根本界限。這也是二程、朱熹大力推崇《大學》“入德之門” 的重要現實理論動機。 

Another important theoretical significance of the “Gateway to the Virtue Realm of Sagehood ” was to counter the cultivation theories of Buddhism and Daoism and to clearly demarcate the fundamental boundaries between Confucianism and the two religions in terms of the goals, methods, and value orientations of their cultivation. This was also an important practical theoretical motive for the Cheng brothers and Zhu Xi in vigorously promoting The Great Learning as the “Gateway to the Virtue Realm of Sagehood .”

在程朱生活的時代，佛道二教的心性理論已經高度成熟，在社會上具有極大的影響力。佛教追求 “明心見性”、超脫輪迴，道教追求 “修道成仙”、長生久視，它們都主張以心性修養為核心工夫，對當時的儒家學者產生了很大的思想吸引力。在程朱看來，佛道的理論和修行路徑存在一個根本缺陷：那就是 “體用殊絕”，割裂了本體與功用的關聯，只談心性的玄妙修養，忽略了現實的人倫事務和社會政治實踐；這種離世、棄世的修行，最終只能歸於 “空虛寂滅” 或 “自私長生” 的價值結果，無法真實解決社會和人倫的問題。 

In the era in which the Cheng brothers and Zhu Xi lived, the mind-nature theories of Buddhism and Daoism had already become highly mature and exerted enormous influence in society. Buddhism sought to “illumine the mind and see one’s nature” and to transcend the cycle of rebirth, while Daoism sought to “cultivate the Way and become an immortal” and to achieve longevity with enduring vision; both advocated mind-nature cultivation as their core practice and held great intellectual appeal for Confucian scholars of the time. In the view of the Cheng brothers and Zhu Xi, the theories and cultivation paths of Buddhism and Daoism had a fundamental defect: namely, they “severed substance and function,” cutting off the connection between original substance and its functioning. They spoke only of the mysterious and abstruse cultivation of mind and nature while neglecting actual human relationships and social-political practice. Such world-renouncing, life-abandoning cultivation could ultimately lead only to the value-outcomes of “emptiness and extinction” or “selfish longevity” and could not truly solve the problems of society and human relationships.

面對這一理論挑戰，二程、朱熹亟須建立一套足以與佛道二教抗衡、且完全區別於佛道的儒家心性修養理論，重新確立儒家在成德之學上的正統地位。而《大學》的 “入德之門”，正是他們用來建構這一理論的核心武器：通過推崇《大學》，闡明儒家的修養路徑，從根本上把儒、釋、道三家的界限劃分清楚。 

Faced with this theoretical challenge, the Cheng brothers and Zhu Xi urgently needed to establish a Confucian theory of mind-nature cultivation that was robust enough to compete with Buddhism and Daoism and completely distinct from them, in order to reassert the orthodox status of Confucianism in the learning of perfecting virtue. The “Gateway to the Virtue Realm of Sagehood ” of The Great Learning was precisely the core weapon they used to construct this theory: by promoting The Great Learning and elucidating the Confucian path of cultivation, they fundamentally drew a clear line separating Confucianism, Buddhism, and Daoism.

程朱指出，儒家的 “入德之門”，與佛道的修行有着本質區別。核心區別在於價值取向的根本差異：儒家以 “實理” 為本體，以現實的、具體的人倫事務為實踐基礎，以在現實世界中實現德性的推擴、達成 “明明德於天下” 為終極目標；而佛道二教都以 “空虛” 或 “長生” 為價值取向，脫離現實的人倫事務，僅僅追求個人的心性解脫或長生久視。基於這一本質差異，兩家的修行工夫也迥然不同：儒家的修養工夫，是 “即物窮理”“開物成務”，即通過格物致知去窮究事物的天理，通過修身、齊家、治國、平天下的實踐去推擴德性；而佛道的修行工夫，卻是 “絕物離人”“離世異俗”，逃避現實的人倫事務和社會職責。 

The Cheng brothers and Zhu Xi pointed out that the Confucian “Gateway to the Virtue Realm of Sagehood ” is essentially different from Buddhist and Daoist cultivation. The core difference lies in the fundamental divergence of value orientations: Confucianism takes “concrete principle” as its original substance, takes actual, specific human relationships and affairs as the foundation of practice, and takes the extension of virtue in the real world to achieve “manifesting illustrious virtue throughout the world” as its ultimate goal. In contrast, both Buddhism and Daoism take “emptiness” or “longevity” as their value orientation, detach themselves from actual human relationships and affairs, and pursue merely individual mental liberation or enduring longevity. Based on this essential difference, the cultivation practices of the two sides are also utterly different: the Confucian cultivation practice is to “exhaust principle by coming into contact with things” and to “open up things and accomplish affairs”—that is, to thoroughly investigate the heavenly principle in things through the investigation of things and extension of knowledge, and to extend virtue through the practices of cultivating oneself, regulating the family, governing the state, and bringing peace to the world. The cultivation practices of Buddhism and Daoism, however, are to “cut off from things and separate from people” and to “withdraw from the world and differ from common customs,” fleeing from actual human relationships and social responsibilities.

通過這一辨析，程朱將《大學》的 “入德之門”，塑造為儒家區別於佛道的標誌性理論範式，從理論上鞏固了儒家成德之學的正統地位。 

Through this differentiation, the Cheng brothers and Zhu Xi shaped the “Gateway to the Virtue Realm of Sagehood ” of The Great Learning into a defining theoretical paradigm that distinguishes Confucianism from Buddhism and Daoism, thereby theoretically consolidating the orthodox status of the Confucian learning of perfecting virtue.

3.3 宗聖合道：實現內聖外王的終極聖賢人格 

3.3 Taking the Sage as the Standard and Uniting with the Way: Realizing the Ultimate Sage Personality of Inner Sageliness and Outer Kingliness

“入德之門” 的終極意義，是指明了學為聖賢的完整路徑，最終實現內聖外王合一的終極聖賢人格。這是《大學》“三綱領”“八條目” 的終極目標，也是程朱理學工夫論的終極價值。 

The ultimate significance of the “Gateway to the Virtue Realm of Sagehood ” is that it points out the complete path for learning to be a sage, finally realizing the ultimate sage personality that unifies inner sageliness and outer kingliness. This is the ultimate goal of the “three guiding principles and eight items” in The Great Learning, and also the ultimate value of the Cheng-Zhu theory of self-cultivation.

在程朱的理論體系中，聖賢人格，是道德修養的終極理想。這種人格，並非遠離人間、超乎世俗的存在，而是將內心的德性修養，與外在的社會政治事功，完全融合為一的人格。“入德之門” 所開啟的進德次第，完整地覆蓋了這一理想人格的所有維度：通過格物致知、誠意正心的向內實踐，明複本然的天地之性，達成 “內聖” 的德性修養；通過修身、齊家、治國、平天下的向外實踐，將內在的德性推擴於天下，成就 “外王” 的社會事功。這兩重工夫往複貫通，形成一個完整的修養鏈條，將個人的道德修養，與家庭、社會、天下的福祉緊密關聯起來；一個人若能將這一完整工夫實踐到底，就能成為內德圓滿、外王化成的真正聖賢。 

In the theoretical system of the Cheng brothers and Zhu Xi, the sage personality is the ultimate ideal of moral cultivation. This personality is not a being that keeps far from human society and transcends the mundane world; rather, it is a personality in which inner virtue cultivation and outer social-political achievements are fully fused into one. The sequence of advancing in virtue opened up by the “Gateway to the Virtue Realm of Sagehood ” completely covers all dimensions of this ideal personality: through the inward practice of investigating things and extending knowledge and making the will sincere and rectifying the mind, one manifests and recovers the original nature of Heaven and Earth, attaining the virtue cultivation of “inner sageliness”; through the outward practice of cultivating oneself, regulating the family, governing the state, and bringing peace to the world, one extends inner virtue to the whole world, accomplishing the social achievements of “outer kingliness.” These two layers of practice interpenetrate back and forth, forming a complete cultivation chain that closely links the individual’s moral cultivation with the well-being of the family, society, and the world. If a person can carry out this complete practice to the end, he can become a true sage whose inner virtue is fully perfected and whose outer kingliness transforms the world.

這一終極意義，也點明了儒家道德修養的真正特質：它不是一種個人的、隱世的、單純的心性修養，而是一種強調成己成物、兼濟天下、內聖外王統一的完整人格實踐；單純具備內在的德性，或單純建立外在的事功，都不足以成為儒家公認的聖賢人格。“入德之門” 所提供的進德次第，恰恰完整地將這兩個方面整合起來，形成了一個由初級到終極、由切近到遠大、由內到外的完整實踐路徑，為後世儒家學者指明了一條切實可行的學聖、成聖之路。 

This ultimate significance also highlights the true character of Confucian moral cultivation: it is not a personal, eremitic cultivation concerned solely with mind and nature, but a complete personality practice that emphasizes perfecting both oneself and things, benefiting the whole world, and unifying inner sageliness and outer kingliness. Possessing inner virtue alone, or merely establishing outer accomplishments, is insufficient to constitute what Confucianism recognizes as a sage personality. The sequence of advancing in virtue provided by the “Gateway to the Virtue Realm of Sagehood ” perfectly integrates these two aspects, forming a complete path of practice from the elementary to the ultimate, from what is near at hand to what is far-reaching, and from the inner to the outer, thus pointing out for later Confucian scholars a genuinely viable way to learn to be a sage and to become a sage.

“入德之門” 是程朱理學工夫論的奠基性命題，其理論內涵是以《大學》為經典依據，通過格物致知、誠意正心、修身、齊家、治國、平天下的完整進德次第，搭建起從初學入門到成德達道的完整橋樑。二程首次將《大學》定性為 “入德之門”，明確了其作為成德之學經典的基礎地位；朱熹進一步補充完善了這一理論，通過《大學章句》的註疏和對格物致知的系統闡釋，將這一範疇整合為完整的理學工夫論體系，指明了一條切實可行的下學而上達、由初學入門終至聖賢境界的道德修養路徑。 

The “Gateway to the Virtue Realm of Sagehood ” is a foundational proposition of the Cheng-Zhu Neo-Confucian theory of self-cultivation. Its theoretical content, taking The Great Learning as its classical basis, builds, through the complete sequence of advancing in virtue—investigating things and extending knowledge, making the will sincere and rectifying the mind, cultivating oneself, regulating the family, governing the state, and bringing peace to the world—a full bridge from the beginner’s entrance to the perfection of virtue and the attainment of the Way. The Cheng brothers were the first to characterize The Great Learning as the “Gateway to the Virtue Realm of Sagehood ,” clarifying its foundational status as the classic of the learning of perfecting virtue. Zhu Xi further supplemented and perfected this theory; through the commentary of his Commentary on the Great Learning in Chapters and Verses and his systematic exposition of the investigation of things and extension of knowledge, he integrated this category into a complete Neo-Confucian system of self-cultivation theory, pointing out a genuinely viable path of moral cultivation in which lower learning leads to higher understanding, advancing from the beginner’s entrance to the realm of the sage.

從學為聖賢的目標來看，“入德之門” 的價值，在於提供了一個循序漸進、本末有序、內外貫通的完整進德次第。這一次第，以格物致知為邏輯起點，貫通了誠意正心的內向修持，再通過修身的樞紐環節，將德性推擴於齊家、治國、平天下的外在事功，將內聖之學與外王之道，緊密融合為一個不可分割的整體。這一整套由切近實踐入手、逐步推擴到天下事功的修養路徑，完美體現了儒家 “重實”“重行” 的實踐特質，區別於佛道二教的離世、棄世的修行路徑。 

Seen from the goal of learning to be a sage, the value of the “Gateway to the Virtue Realm of Sagehood ” lies in its provision of a complete, step-by-step sequence for advancing in virtue that is orderly in root and branch and that connects inner and outer. This sequence takes the investigation of things and extension of knowledge as its logical starting point, connects through the inward cultivation of making the will sincere and rectifying the mind, and then, via the pivotal link of cultivating oneself, extends virtue outward to the outer accomplishments of regulating the family, governing the state, and bringing peace to the world, tightly fusing the learning of inner sageliness and the way of outer kingliness into an indivisible whole. This entire path of cultivation, which starts from near-at-hand, concrete practice and gradually extends to the affairs and accomplishments of the whole world, perfectly embodies the practical character of Confucianism, which “values concrete reality” and “values practice,” and distinguishes itself from the world-renouncing, life-abandoning cultivation paths of Buddhism and Daoism.

時至今日，這一理論仍然具有重要的思想參考價值。它所強調的道德修養必須從切近基礎的工夫入手、必須循序漸進、必須由內在德性向外在實踐推擴的邏輯路徑，對今人仍有借鑒意義；它所闡述的由初級到高級、由內心到外在、由自我到社會的道德修養規律，也符合道德人格養成的基本過程。理解 “入德之門” 的深刻內涵，不僅能準確把握程朱理學工夫論的基本邏輯，更能深入理解儒家強調切己實踐、明體達用、修己安人、內聖外王統一的根本特質。 

Even today, this theory still possesses significant intellectual and referential value. The logical path it emphasizes—that moral cultivation must begin from near-at-hand, foundational practice, must proceed step by step, and must extend from inner virtue to outer practice—still offers lessons for people today. The rule of moral cultivation it expounds, moving from the elementary to the advanced, from the inner to the outer, and from the self to society, also accords with the basic process of forming a moral personality. Understanding the profound content of the “Gateway to the Virtue Realm of Sagehood ” allows us not only to accurately grasp the basic logic of the Cheng-Zhu theory of self-cultivation but also to deeply comprehend the fundamental character of Confucianism, which stresses personal, concrete practice, clarifying substance to realize function, cultivating oneself to bring peace to others, and unifying inner sageliness and outer kingliness.

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      入德之门，程朱理学，大学，八条目，进德修业，圣贤修养，儒家修身，传统理学，内圣外王，道德修养
    

        入德之门理学阐释，程朱理学修养次第，大学八条目修养体系，儒家圣贤人格，理学德性修养论
     

      学为圣贤，下学上达，格物致知，诚意正心，修身齐家，朱熹理学思想，二程理学，儒家进德修业，传统道德教化，理学实践工夫
    

       入德之门，程朱理学，大学，八条目，进德修业，圣贤修养，儒家修身，内圣外王，格物致知，诚意正心，朱熹理学，德性修养，传统道德，理学阐释，下学上达