入德之门的经典奠基：

二程与朱熹以《大学》为修德根本的深度理论研究

The Classical Foundation of the "Gateway to the Virtue Realm of Sagehood ": An In-depth Theoretical Study on the Cheng Brothers and Zhu Xi Taking The Great Learning as the Fundamental Basis for Moral Cultivation

一、核心前提：理学视域下“入德之门”的本质内涵与成圣目标

I. Core Premise: The Essential Meaning of the "Gateway to the Virtue Realm of Sagehood " and the Goal of Sagehood from the Neo-Confucian Perspective

欲厘清《大学》何以成为入德之门，必先界定二程、朱熹语境中“入德之门”的核心要义。所谓“入德”，并非浅层的道德行善，而是凡人转圣贤、气质变化、复归天理本体的终极修为；所谓“门”，是成圣之学的入门正轨、必由路径、工夫准则，是区别于空寂虚妄、偏执形器的正统儒学修德通道。

To clarify why The Great Learning became the Gateway to the Virtue Realm of Sagehood, one must first define the core meaning of "Gateway to the Virtue Realm of Sagehood " in the discourse of the Cheng brothers and Zhu Xi. "Entering virtue" does not mean superficial moral conduct or doing good deeds, but rather the ultimate cultivation through which an ordinary person transforms into a sage, alters his physical nature, and returns to the original substance of Heavenly Principle. The "gate" is the correct entrance, the necessary path, and the standard of practice for the learning of sagehood, a gateway to orthodox Confucian moral cultivation distinguished from the empty stillness and false illusions, or the biased clinging to concrete forms and implements.

朱熹毕生参悟程子之学，最终凝练出“涵养须用敬，进学则在致知”的入德核心工夫，明确指出此二语为“入德之门无逾于此”。同时，朱熹深刻反思当世学弊：宋世学者或流于佛老空寂之学，空谈义理而无实操；或滞于形器功利，拘于书本字句而无德性体悟，二者皆不得圣门修德之正途。而“入德之门”的核心诉求，是解决学人不知修德路径、工夫偏废、内外割裂的根本问题，为“学为圣贤”提供可落地、可次第、可精进的完整体系。

Zhu Xi devoted his entire life to comprehending the learning of the Cheng masters and finally condensed the core practice of entering virtue: "For self-cultivation one must use reverence; for advancing in learning, the key lies in extending knowledge," explicitly stating that no other words surpass these as the "Gateway to the Virtue Realm of Sagehood." At the same time, Zhu Xi profoundly reflected on the scholarly maladies of his time: Song scholars either drifted into the empty and tranquil learning of Buddhism and Daoism, engaging in empty talk of principles without real practice, or stagnated amidst concrete implements and utility, restricting themselves to the words and phrases of books without moral experience. Neither group obtained the correct path of moral cultivation in the Confucian school. The core appeal of the "Gateway to the Virtue Realm of Sagehood " is to solve the fundamental problems of learners not knowing the path of moral cultivation, practicing one aspect to the neglect of another, and severing the inner from the outer, thereby providing a complete system that is practicable, sequential, and allows for sustained advancement for "learning to become a sage."

在理学的成圣体系中，圣贤并非遥不可及的境界，而是人人可学、步步可至的人格目标。其核心践履次第贯穿始终：以格物致知开启认知之基，以诚意正心夯实心性之本，以修身立己达成德性自足，以齐家治国平天下实现德性外化，最终完成个体德性与天地天理的合一。这一完整的成圣逻辑，唯有《大学》可以完整承载，这也是二程、朱熹舍诸经而独尊《大学》为入德第一门径的根本前提。

In the Neo-Confucian system of attaining sagehood, the sage is not an unreachable realm but a personality goal that everyone can learn to achieve and can reach step by step. Its core sequence of practice runs throughout: starting with investigating things and extending knowledge to lay the cognitive foundation, proceeding to making the will sincere and rectifying the mind to consolidate the root of mind and nature, achieving self-perfection in virtue through self-cultivation, and realizing the externalization of virtue through regulating the family, governing the state, and bringing peace to the world, and finally completing the unity of individual virtue with Heaven, Earth, and Heavenly Principle. This complete logic of sagehood can be fully borne only by The Great Learning, which is also the fundamental premise for why the Cheng brothers and Zhu Xi rejected other classics and uniquely honored The Great Learning as the foremost gateway for entering virtue.

二、根本性理论问题：二程、朱熹择定《大学》为“入德之门”的核心缘由

II. Fundamental Theoretical Issue: The Core Reasons Why the Cheng Brothers and Zhu Xi Selected The Great Learning as the "Gateway to the Virtue Realm of Sagehood "

纵观程朱理学体系，二人尊崇《大学》、将其定为圣门入德正途，并非经典偏好，而是基于义理完整性、工夫次第性、救弊针对性、成圣适配性四大核心理论考量，是对先秦儒学的重构与理学化的体系完善，可从四大维度深度阐释。

Surveying the entire Cheng–Zhu Neo-Confucian system, their honoring of The Great Learning and establishing it as the correct path for entering virtue in the Confucian school was not a matter of canonical preference, but was based on four core theoretical considerations: doctrinal completeness, sequentiality of practice, targeted correction of contemporary ills, and suitability for achieving sagehood. This represented a reconstruction of pre-Qin Confucianism and a Neo-Confucian systemic perfection, which can be deeply elucidated from four major dimensions.

（一）义理体系完备：唯一贯通“心性涵养”与“穷理进学”的经典，破解入德工夫二元割裂

(A) Complete Doctrinal System: The Only Classic That Integrates "Nourishment of Mind-and-Nature" and "Exhaustive Investigation of Principle to Advance Learning," Resolving the Dichotomy in the Practice of Entering Virtue

朱熹明确提出，入德的核心在于“主敬致知，交相为助”，涵养居敬（未发静功）与穷理致知（已发动功）如车之两轮、鸟之两翼，不可偏废。单主敬而不穷理，则易堕入佛老空寂，空心守性、无义理支撑；单穷理而不主敬，则易滞于形器字句，逐末忘本、无德性主宰，二者偏废皆为修德大病。而遍览儒家经典，唯有《大学》完美融合了程朱“敬以直内、义以方外”的核心工夫，实现了涵养与致知的辩证统一。

Zhu Xi clearly pointed out that the core of entering virtue lies in "abiding in reverence and extending knowledge, with the two aiding each other." Nourishing the self and abiding in reverence (the still practice of the unaroused state) and exhaustively investigating principle to extend knowledge (the active practice of the aroused state) are like the two wheels of a cart or the two wings of a bird – neither can be dispensed with. If one exclusively abides in reverence without investigating principle, one easily falls into the empty stillness of Buddhism and Daoism, guarding the nature with an empty mind and without doctrinal support. If one exclusively investigates principle without abiding in reverence, one easily stagnates among concrete implements and phrases, pursuing the branches and forgetting the root, without a moral master. Neglecting either is a grave illness in moral cultivation. A comprehensive survey of the Confucian classics reveals that only The Great Learning perfectly integrates the core practice of the Cheng–Zhu school, "rectifying the inner with reverence and regulating the outer with righteousness," achieving a dialectical unity of self-nourishment and the extension of knowledge.

《大学》以“八条目”构建了完整的修德体系：格物、致知对应“进学致知”的向外穷理之功，要求学人探究万事万物之天理，破除愚昧偏执，解决“擿埴冥行”、学无门径的困境；诚意、正心对应“涵养主敬”的向内存心之功，要求学人收拾身心、专一主宰、去除私欲，实现未发涵养、已发省察的动静合一。朱熹在《朱子语类》中反复强调：“存养中便有穷理工夫，穷理中便有存养工夫”，而《大学》的核心价值，正是将二者固化为不可分割的成圣工夫，彻底解决了当时学界“重内轻外、重静轻动、重涵养轻穷理”的片面学风。

The Great Learning constructs a complete system of moral cultivation through the "Eight Items": investigating things and extending knowledge correspond to the outward practice of "advancing learning and extending knowledge," requiring learners to probe the Heavenly Principle in all things, break through ignorance and obstinacy, and resolve the dilemma of "groping blindly in the dark" and learning without a gateway. Making the will sincere and rectifying the mind correspond to the inward practice of "nourishing the self and abiding in reverence," requiring learners to gather body and mind, concentrate on a single master, eliminate selfish desires, and realize the unity of stillness and activity in nourishing before arousal and examining after arousal. In Classified Conversations of Zhu Xi, Zhu Xi repeatedly emphasized: "Within preserving and nourishing, there is already the practice of investigating principle; within investigating principle, there is already the practice of preserving and nourishing." The core value of The Great Learning is precisely to solidify these two as an inseparable practice of sagehood, thoroughly resolving the one-sided scholarly tendencies of that time, which "valued the inner and slighted the outer, valued stillness and slighted activity, and valued self-nourishment and slighted the investigation of principle."

相较于《论语》语录零散、《孟子》侧重心性义理、《中庸》偏重天道境界，《大学》不空谈天理、不玄论心性，而是将抽象的“入德”转化为可操作、可兼顾、不偏废的敬知双修体系，这是二程、朱熹将其定为入德之门的首要义理依据。二程直言“入德之门，无如《大学》”，正是因其完美契合圣门“内外交修、知行合一”的修德本质。

Compared with the scattered sayings of the Analects, the Mencius' emphasis on mind-and-nature doctrine, and the Doctrine of the Mean's stress on the realm of Heavenly Dao, The Great Learning does not idly talk about Heavenly Principle or mysteriously discuss mind-and-nature, but transforms the abstract "entering virtue" into a practicable, balanced, and non-partial dual cultivation system of reverence and knowledge. This is the primary doctrinal basis for the Cheng brothers and Zhu Xi to establish it as the Gateway to the Virtue Realm of Sagehood . The Cheng brothers directly stated, "For the Gateway to the Virtue Realm of Sagehood , nothing compares to The Great Learning," precisely because it perfectly matches the essence of moral cultivation in the Confucian school: "inner and outer cultivation combined, knowledge and action united."

（二）工夫次第严谨：构建循序渐进的成圣阶梯，适配学人从凡入圣的修养规律

(B) Rigorous Sequence of Practice: Constructing a Gradual Ladder to Sagehood That Fits the Law of Self-Cultivation from the Ordinary to the Sage

“学为圣贤”并非一蹴而就的顿悟，而是日积月累、层层递进的践履过程，这是程朱德性修养的核心认知。朱熹强调进德修业需“日新又新、乾乾不息”，反对空谈圣贤气象、妄想一蹴而成圣。而《大学》区别于其他经典的核心优势，在于其拥有独一无二、环环相扣、次第森严的修德次第，为学人提供了从入门到大成的完整成圣路径。

"Learning to become a sage" is not a sudden enlightenment achieved in one leap, but a gradual, accumulating, and step-by-step practice process; this is a core understanding of Cheng–Zhu moral cultivation. Zhu Xi emphasized that advancing in virtue and cultivating one's vocation requires "daily renewal and unceasing vigor," opposing empty talk of the sage's aura and the delusion of attaining sagehood in a single bound. The core advantage of The Great Learning that distinguishes it from other classics is that it possesses a unique, interlocking, and rigorously ordered sequence of moral cultivation, offering learners a complete path to sagehood from entry to full accomplishment.

《大学》三纲领、八条目构建了完整的成圣进阶链条：始于格物致知，破除认知蒙蔽，明辨天理人欲；进而诚意正心，净化心性本体，树立道德主宰；根基在于修身，实现个体德性圆满；向外推及齐家、治国、平天下，完成德性的社会化、宇宙化开显。这一次第完全契合朱熹“修德是本，讲学为用”的核心原则：格致讲学是进学之方，诚正修身是修德之本，本末有序、轻重有别，完美回应了孔子“德之不修，学之不讲”的教化之忧。

The Three Guiding Principles and Eight Items of The Great Learning construct a complete progressive chain for sagehood: it begins with investigating things and extending knowledge to break through cognitive delusions and clearly distinguish Heavenly Principle from human desires; then proceeds to making the will sincere and rectifying the mind to purify the original substance of mind-and-nature and establish a moral master; its root lies in self-cultivation, achieving personal moral completeness; and it extends outward to regulating the family, governing the state, and bringing peace to the world, completing the socialization and cosmic manifestation of virtue. This sequence perfectly matches Zhu Xi's core principle that "cultivating virtue is the root, while lecturing and learning is the function": investigating things, extending knowledge, and lecturing are the methods for advancing learning, while making the will sincere, rectifying the mind, and self-cultivation are the root of cultivating virtue. Root and branch are ordered, and weight and priority are distinguished, perfectly answering the educational concern of Confucius that "virtue is not cultivated, and learning is not expounded."

二程指出，当世学者迷失入德之门，核心症结在于无次第、无阶梯，要么好高骛远、空谈平治天下，要么拘于小节、局限日用细碎。而《大学》的次第体系，实现了“自卑升高、由近及远、由浅入深”的修养逻辑。从小学的洒扫应对、收心养性，到大学的穷理正心、修己治人，《大学》贯通人生全部修养阶段，让初学之士有入门之径，精进之人有深造之方，杜绝躐等冒进、虚空求索的修德弊病。朱熹高度肯定这一特质，认为《大学》是学者立身进步之要，唯有依此次第用功，方能“知益明，守益固，旧习日改月化”。

The Cheng brothers pointed out that the key reason why scholars of that time lost the Gateway to the Virtue Realm of Sagehood was the lack of sequence and steps: they either aimed too high and far, emptily discussing how to pacify the world, or confined themselves to trivial details and daily minutiae. The sequential system of The Great Learning realizes the cultivation logic of "rising from the lowly to the elevated, advancing from the near to the distant, and proceeding from the shallow to the deep." From the elementary learning of sprinkling and sweeping, responding to others, gathering the mind and nourishing the nature, to the great learning of exhaustively investigating principle, rectifying the mind, cultivating oneself and governing others, The Great Learning threads through all stages of a person's cultivation, giving beginning scholars a way to enter and advanced practitioners a method for profound study, eliminating the moral cultivation defects of overleaping and rushing ahead or hollowly seeking in emptiness. Zhu Xi highly affirmed this characteristic, believing that The Great Learning is the essential key for a scholar to establish himself and make progress; only by applying effort according to this sequence can one "have increasingly clear knowledge, increasingly firm hold, and old habits transformed day by day and month by month."

（三）救弊功能鲜明：扭转宋世学弊，重塑儒学务实入世的德性品格

(C) Distinctive Function of Remedying Maladies: Reversing the Scholarly Ills of the Song Era and Reshaping the Practical, World-Engaging Moral Character of Confucianism

二程、朱熹推崇《大学》，具有极强的时代针对性，核心是为了挽救宋代儒学衰败、异论蜂起的学术危局。朱熹明确批判当世学风两大弊端：“语高则偏于空寂，卑则滞于形器”。一方面，佛老学说盛行，学者沉溺虚空顿悟，舍弃人伦日用、修身治世的实功，背离儒家入世之本；另一方面，俗儒只读经书字句、追逐功利，以读书穷理为技艺，不以修德成圣为目标，本末倒置、德性荒芜。

The Cheng brothers and Zhu Xi's veneration of The Great Learning had a strong contemporary relevance, its core aim being to rescue the perilous scholarly situation of Song Confucianism, which was declining and rife with heterodox views. Zhu Xi explicitly criticized two major maladies of the scholarly ethos of his time: "Those who speak loftily incline toward emptiness and quietism; those who speak humbly stagnate among concrete forms and implements." On one hand, Buddhist and Daoist doctrines were prevalent, and scholars indulged in the empty and tranquil sudden awakening, abandoning the practical work of human relations, daily affairs, self-cultivation, and ordering the world, and thus deviating from the foundation of Confucian world engagement. On the other hand, vulgar Confucians merely read the words and phrases of the classics, pursuing utility and gain, treating reading and investigating principle as a technical skill without aiming at moral cultivation and sagehood, putting the cart before the horse and leaving virtue barren.

在朱熹看来，诸多经典或义理高深、初学难入，或偏重纪事、义理零散，无法救治当世学弊。唯独《大学》不偏空、不滞器，居于“正当紧要亲切合理之处”：既讲求穷理致知，杜绝空疏虚妄；又坚守诚意修身，破除功利形器之蔽；既重心性涵养的内圣之功，又重经世致用的外王之业，完美对冲了当时儒学的两大偏执。

In Zhu Xi's view, many classics were either too profound in doctrine for beginners to enter, or biased toward recording events with scattered principles, and thus could not remedy the scholarly ills of the age. Only The Great Learning, neither inclining toward emptiness nor stagnating in concrete forms, stands at "the precisely crucial, intimate, and reasonable point": it both stresses the investigation of principle and extension of knowledge, eradicating emptiness and falsehood, and firmly holds to making the will sincere and self-cultivation, breaking through the obscuration of utility and concrete forms; it attends to the inner sagely work of nourishing mind-and-nature and also to the outer kingly enterprise of ordering the world and putting learning into practice, perfectly counterbalancing the two major biases of contemporary Confucianism.

同时，针对当时“假佛释之似以乱孔孟之实”“以读书穷理为大禁”的异端乱象，二程明确断言：“《大学》，孔子遗言也。学者由是而学，则不迷于入德之门也。”在理学看来，《大学》是孔孟圣学的正统真传，是区别于佛老异端、俗儒末学的核心标尺。以《大学》为入德之门，便是确立圣学正统，为天下学人划定修德正轨，杜绝异说惑乱、邪妄滋长，这是程朱择定《大学》的重要时代与学术使命。

At the same time, aimed at the heterodox chaos of "using the semblance of Buddhism to confuse the reality of Confucius and Mencius" and "making reading and investigating principle a great prohibition," the Cheng brothers clearly declared: "The Great Learning is the transmitted word left by Confucius. If a scholar learns by following it, he will not lose his way at the Gateway to the Virtue Realm of Sagehood." From the Neo-Confucian viewpoint, The Great Learning is the orthodox, genuine transmission of Confucius and Mencius' sagely learning, the core standard for distinguishing heterodox Buddhism and Daoism and the inferior learning of vulgar Confucians. To take The Great Learning as the Gateway to the Virtue Realm of Sagehood  is to establish the orthodoxy of the sagely learning, delimit the correct path of moral cultivation for all scholars under Heaven, and put an end to the confusion of heterodox doctrines and the growth of deviant falsehoods. This was an important contemporary and academic mission of the Cheng–Zhu school in choosing The Great Learning.

（四）成圣格局完整：贯通内圣外王，实现个体德性与天下治理的终极统一

(D) Complete Scope of Sagehood: Integrating Inner Sage and Outer King, Realizing the Ultimate Unity of Individual Virtue and World Governance

程朱理学的终极目标，并非独善其身的个体修身，而是内圣外王、德济天下的圣贤境界，其修德体系始终立足“学为圣贤、兼济天下”的核心锚点。圣贤气象绝非孤高隐逸、空守心性，而是刚健有为、日新不息、贯通身心、家国、天下的完整人格。而《大学》是先秦儒学中唯一将“个体心性修养”与“家国天下治理”完全贯通的经典，完美承载了程朱的圣贤理想。

The ultimate goal of Cheng–Zhu Neo-Confucianism is not individual self-cultivation for one's own perfection alone, but the sage's realm of inner sage and outer king, benefiting the world with virtue. Its moral cultivation system is always grounded in the core anchor of "learning to become a sage and simultaneously benefiting the world." The aura of the sage is by no means one of aloof seclusion and empty guarding of the mind-and-nature, but rather a complete personality that is vigorous and active, daily renewing without cease, and connects body and mind, family and state, and the entire world. The Great Learning is the only classic of pre-Qin Confucianism that completely connects "individual cultivation of mind-and-nature" with "governing family, state, and world," perfectly bearing the Cheng–Zhu ideal of sagehood.

从修养次第来看，《大学》实现了从身心之修到天下之治的层层开显：格致诚正、修身是内圣工夫，成就个体纯粹德性、复归天理本性；齐家治国平天下是外王功业，将个体德性推扩于人伦、社会、家国乃至天下。这与朱熹“进德修业，不但为一身，亦欲有为于天下”的人生理想高度契合。朱熹强调，进德是心上日新，修业是事上笃行，圣贤之学必须身心并重、内外交修，既有涵养本心之静，又有经世履职之动。

From the perspective of the cultivation sequence, The Great Learning realizes a step-by-step unfolding from the cultivation of body and mind to the governance of the world: investigating things, extending knowledge, making the will sincere, rectifying the mind, and self-cultivation constitute the inner sagely practice, achieving the pure virtue of the individual and returning to the original nature of Heavenly Principle; regulating the family, governing the state, and bringing peace to the world constitute the outer kingly enterprise, extending individual virtue into human relations, society, state, and the world. This highly matches Zhu Xi's life ideal that "advancing in virtue and cultivating one's vocation is not only for one's own person, but also desires to accomplish something for the world." Zhu Xi stressed that advancing in virtue is daily renewal in the mind, and cultivating one's vocation is earnest practice in affairs; the learning of the sage must equally stress body and mind, cultivate both inner and outer, possessing both the stillness of nourishing the original mind and the activity of ordering the world and fulfilling duties.

反观其他经典，《中庸》极高明而道中庸，偏重天道性命的本体阐释，缺乏具体的治世践履次第；《论》《孟》多散见修身、为政之言，未成系统层级。唯有《大学》将个人德性修养与家国治理、天下平治融为一体，让入德之学不再是孤立的个人心性修炼，而是贯通自我、人伦、社会、天下的圣贤大业。即便延伸至当代全球治理视域，《大学》“修身—济世”的逻辑依然成立，以个体德性之正，推及社群、国家、天下之治，正是儒家圣贤之道的终极格局。

In contrast, other classics like the Doctrine of the Mean, which is supremely brilliant yet practices the mean, lean toward ontological exposition of Heavenly Dao and human nature, lacking concrete sequential practice for ordering the world; the Analects and the Mencius contain mostly scattered sayings on self-cultivation and governance that do not form a systematic hierarchy. Only The Great Learning fuses individual moral cultivation with the governance of family, state, and the pacification of the world, making the learning of entering virtue no longer an isolated individual cultivation of mind-and-nature, but the great enterprise of sagehood that connects self, human relations, society, and the world. Even extending into the contemporary perspective of global governance, the logic of The Great Learning—"self-cultivation to benefiting the world"—still holds: beginning from the correctness of individual virtue and extending to the governance of community, state, and world is precisely the ultimate scope of the Confucian Way of the sage.

三、《大学》作为“入德之门”的核心价值与理学奠基意义

III. The Core Value of The Great Learning as the "Gateway to the Virtue Realm of Sagehood " and Its Foundational Significance for Neo-Confucianism

基于二程、朱熹的系统阐释，《大学》超越了普通儒家经典的文本价值，成为宋明理学成圣之学的总纲领、德性修养的总范式、儒学复兴的总抓手，其核心重要性可总结为三点。

Based on the systematic exposition of the Cheng brothers and Zhu Xi, The Great Learning transcends the textual value of an ordinary Confucian classic and becomes the general program for the learning of sagehood in Song–Ming Neo-Confucianism, the general paradigm for moral cultivation, and the general lever for the revival of Confucianism. Its core importance can be summarized in three points.

（一）确立圣学入门正轨，终结修德无门的学术迷茫

(A) Establishing the Correct Entrance to Sagely Learning, Ending the Scholarly Confusion of Having No Gate to Moral Cultivation

在程朱之前，儒家修德缺乏统一、系统的工夫范式，学者或盲从佛老、或拘于训诂、或空谈义理，始终不得圣学要领。二程首倡《大学》为入德第一门径，朱熹进一步完善其义理、细化其次第、固化其地位，将“格致、诚正、修身、治世”确立为唯一正统的入德路径。自此，儒家“学为圣贤”不再是模糊的道德愿景，而是有门可入、有路可走、有阶可攀的实修体系，彻底终结了汉唐以来儒学修德碎片化、功利化、空疏化的困境。

Before the Cheng brothers and Zhu Xi, Confucian moral cultivation lacked a unified and systematic paradigm of practice. Scholars either blindly followed Buddhism and Daoism, confined themselves to textual exegesis, or idly discussed principles, without ever grasping the essentials of the sagely learning. The Cheng brothers first advocated The Great Learning as the foremost gateway for entering virtue, and Zhu Xi further perfected its doctrine, refined its sequence, and solidified its status, establishing "investigating things and extending knowledge, making the will sincere and rectifying the mind, self-cultivation, and ordering the world" as the sole orthodox path of entering virtue. Henceforth, the Confucian "learning to become a sage" was no longer a vague moral vision but a real cultivation system with a gate to enter, a road to walk, and steps to climb, thoroughly ending the fragmented, utilitarian, and hollow predicament of Confucian moral cultivation since the Han and Tang dynasties.

（二）统一敬知双修工夫，构建理学核心德性修养体系

(B) Unifying the Dual Practice of Reverence and Knowledge, Constructing the Core Neo-Confucian System of Moral Cultivation

《大学》完整承载了程朱“涵养用敬、进学致知”的核心工夫，实现了未发涵养与已发省察、静守本心与动穷物理、内圣修身与外王经世的完美统一。朱熹通过阐释《大学》，明确了“敬为存心之要、知为进学之功”，二者交相为助、循环精进，让德性修养既有心性本源的根基，又有义理认知的支撑，彻底规避了偏静、偏动、偏内、偏外的修德弊病，构建了理学独一无二、圆融完备的德性工夫论体系。

The Great Learning fully bears the core practice of the Cheng–Zhu school: "For self-cultivation use reverence; for advancing in learning extend knowledge," achieving a perfect unity of nourishing before arousal and examining after arousal, of quietly guarding the original mind and actively investigating the principles of things, and of inner sagely self-cultivation and outer kingly ordering of the world. By explicating The Great Learning, Zhu Xi made clear that "reverence is the essential for preserving the mind, and knowledge is the effort for advancing learning," with the two aiding each other and advancing in a cyclical refinement. This gave moral cultivation both a root in the original source of mind-and-nature and support from cognitive doctrine, thoroughly avoiding the moral cultivation defects of leaning exclusively toward stillness, activity, inner, or outer, and thereby constructing the uniquely complete and well-rounded Neo-Confucian system of moral practice theory.

（三）重塑儒家圣贤理想，奠定内圣外王的中华文化精神内核

(C) Reshaping the Confucian Ideal of the Sage and Establishing the Inner Sage and Outer King as the Spiritual Core of Chinese Culture

《大学》以次第化、体系化的方式，将儒家圣贤人格落地为终身践履的人生范式：初学以此修身立品，精进以此进德修业，大成以此治国平天下。朱熹强调，圣贤气象不是空想的境界，而是步步笃行的结果，学者摒弃虚空体悟、执着切己修身，依《大学》次第用功，即可自卑升高、渐入圣贤之域。这一阐释重塑了儒学务实、刚健、入世的核心品格，让儒家成圣之学扎根人伦日用、贯通古今世事，成为中国传统道德教育、人格塑造、治国理政的核心理论根基。

The Great Learning actualizes the Confucian sage personality, in a sequential and systematic way, as a life paradigm of lifelong practice: beginners use it to cultivate themselves and establish character, advanced practitioners use it to advance in virtue and vocation, and those of great accomplishment use it to govern the state and bring peace to the world. Zhu Xi emphasized that the sage's aura is not an imaginary realm but the result of sincere step-by-step practice. When a scholar abandons empty experience, persistently engages in concrete self-cultivation, and applies effort according to the sequence of The Great Learning, he can rise from the lowly to the elevated and gradually enter the realm of the sage. This interpretation reshaped the core character of Confucianism as practical, vigorous, and engaged in the world, rooting the Confucian learning of sagehood in human relations and daily affairs and connecting it with affairs past and present, making it the core theoretical foundation of traditional Chinese moral education, character formation, and governance.

二程、朱熹择定《大学》为“入德之门”，绝非经典文本的简单推崇，而是基于理学成圣目标、工夫逻辑、时代救弊的根本性理论抉择。相较于诸经，《大学》兼具义理之圆融、次第之严谨、工夫之完备、格局之宏大、救弊之切实五大特质，唯一完整承载了“涵养致知交相发、内圣外王相贯通、身心天下相统一”的理学核心诉求。

The Cheng brothers and Zhu Xi's choice of The Great Learning as the "Gateway to the Virtue Realm of Sagehood " was by no means a simple endorsement of a classical text, but a fundamental theoretical decision based on the Neo-Confucian goal of sagehood, the logic of practice, and the need to remedy the ills of the time. Compared with other classics, The Great Learning possesses five major qualities: doctrinal completeness and harmony, rigorous sequentiality, comprehensive practice, grand scope, and concrete efficacy in correcting maladies. It alone fully bears the core Neo-Confucian demand: "Self-nourishment and the extension of knowledge stimulate each other; inner sage and outer king are interconnected; body, mind, and world are united as one."

以《大学》为门径，学人得以破除修德迷茫、规避学风偏执，从格物致知的认知起步，经由诚意正心的心性涵养、修身立德的自我完善，最终抵达齐家治国平天下的圣贤境界。这一体系不仅构建了宋明理学完整的德性伦理与道德教育体系，更确立了中华儒学“学以成圣、德以济世”的永恒精神内核，成为历代士人修德立身、经世致用的根本准绳。

Taking The Great Learning as the gateway, learners can break through the confusion about moral cultivation, avoid one-sided scholarly tendencies, start from the cognitive beginning of investigating things and extending knowledge, pass through the mind-and-nature nourishment of making the will sincere and rectifying the mind and the self-perfection of self-cultivation and establishing virtue, and finally reach the sage's realm of regulating the family, governing the state, and bringing peace to the world. This system not only constructs the complete virtue ethics and moral education system of Song–Ming Neo-Confucianism, but also establishes the eternal spiritual core of Chinese Confucianism: "Learning to become a sage, and using virtue to benefit the world." It became the fundamental standard for generations of scholar-officials to cultivate virtue, establish themselves, and put their learning into practical use.

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