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Zhuangzi's 'Gengsang Chu': A Pre-Qin Philosophical Inquiry into 'When the Inner Universe Is Tranquil and Settled, Celestial Light Emanates'

This article offers an in-depth reading of the central proposition 'When the inner universe is tranquil and settled, celestial light emanates' from the Gengsang Chu chapter of the Zhuangzi, integrating pre-Qin classical sources to elucidate its five-layered philosophical architecture: inner stillness, the sympathetic resonance of Heaven and humanity, the transcendence of intellective limits, and the order of the celestial Way.

Xuanji Editorial Board February 7, 2026 26 min read PDF Markdown
Zhuangzi's 'Gengsang Chu': A Pre-Qin Philosophical Inquiry into 'When the Inner Universe Is Tranquil and Settled, Celestial Light Emanates'

Part Two: "When the Inner Universe Is Tranquil and Settled, Celestial Light Emanates" -- Inner Quiescence and Celestial Radiance


Chapter Four: A Study of the Character Yu ("Universe" / "Inner Space")

Section 1: The Original Meaning of Yu

"When the inner universe is tranquil and settled, celestial light emanates." The first question to pursue is: what does the character yu mean here$25

The original meaning of yu is a roof or eave -- the sheltering overhang of a dwelling. The Shijing, "Bin Feng: Qi Yue" (Airs of Bin: Seventh Month) says:

"In the seventh month, the cricket is in the fields; in the eighth month, under the eaves (yu); in the ninth month, at the door; in the tenth month, the cricket enters beneath my bed."

Here yu means the eaves. In the eighth month the cricket shelters under the eaves, in the ninth month it enters the doorway, and in the tenth month it reaches beneath the bed -- gradually moving inward.

Yet the extended meanings of yu reach far beyond this. A passage earlier in the "Gengsang Chu" chapter itself says:

"That which has substance yet no fixed location is yu (space). That which has extension yet no beginning or end is zhou (time)."

Here Master Zhuang himself defines yu as "that which has substance yet no fixed location" -- something that truly exists yet has no determinate place. And zhou is "that which has extension yet no beginning or end" -- something that endures through time yet has neither start nor finish.

Yu corresponds to space; zhou corresponds to time. This is the classic pre-Qin philosophical definition of "the universe" (yuzhou).

But the question is: does this cosmological definition of yu carry the same meaning as the yu in "when the inner universe (yu) is tranquil and settled"$26

Section 2: The Yu of "the Tranquil Inner Universe" -- The Universe of the Mind

The yu in "the tranquil inner universe" (yu tai ding) has been variously explained. Considered in the context of the passage, however, this yu should refer to a person's inner space -- the universe of the mind.

How do we know$27 Because this sentence follows directly upon the preceding discussion of "the principles of safeguarding life." Everything treated in that discussion concerns the discipline of inner cultivation -- embracing the One, maintaining stillness, being at ease, being open and simple, becoming like an infant -- all of these are operations at the level of the mind and spirit. "The tranquil inner universe" is therefore naturally a description of a state at the level of the mind and spirit.

Yu is the space of the mind. A person's mind is like an inner universe. The Guanzi, "Neiye" (Inward Training), says:

"The form of the mind is such that it fills and replenishes itself, generates and completes itself. The reason it is lost is invariably through worry, joy, delight, anger, desire, and profit-seeking. If one can rid oneself of worry, joy, delight, anger, desire, and profit-seeking, the mind returns to its proper state."

It also says:

"The mind stores a mind within itself; within the mind there is yet another mind. That mind within the mind -- its sound precedes speech. After the sound comes form; after form comes speech."

The "mind" (xin) discussed in the Guanzi here is precisely an inner space, an inner universe. Within this "mind" there is "yet another mind" -- in the depths of the mind there is a still deeper mind. This accords exactly with the yu of "the tranquil inner universe."

In the "Renjian Shi" (The Human World) chapter of the Zhuangzi, Confucius teaches Yan Hui the method of "fasting of the mind" (xin zhai):

"Unify your attention. Do not listen with the ears but listen with the mind. Do not listen with the mind but listen with the vital breath (qi). The ears stop at hearing; the mind stops at matching. The vital breath is that which is empty and waits for things. Only the Way gathers in emptiness. Emptiness -- that is the fasting of the mind."

The "emptiness" of this "fasting of the mind" is the foundational discipline for the "settledness" (ding) of "the tranquil inner universe." When the space of the mind (yu) attains a state of emptiness, that is the precondition for "tranquil settledness."

The Zhuangzi, "Da Zongshi" (The Great Ancestral Teacher), describes the state of the True Person:

"The True Persons of old did not reject the few, did not lord over success, and did not scheme. Being so, they could pass through error without regret and encounter what was fitting without self-congratulation. Being so, they could climb heights without trembling, enter water without getting wet, enter fire without feeling the heat. Only knowledge that ascends to the Way can be like this."

The reason the True Person can "climb heights without trembling, enter water without getting wet, enter fire without feeling the heat" is precisely that his inner yu has already become "tranquil and settled." When the inner space is settled, no external peril can shake him.

Section 3: The Archaic Origins of Yu -- The Roof Radical and Yu ("To Be In")

From the perspective of paleography, a deeper investigation of the character yu may be pursued. Yu is composed of the radical mian (roof) and the phonetic element yu ("in, at"). The radical mian, as noted above, depicts the canopy of a roof. The element yu in archaic Chinese carries the meaning "to be in," expressing existence and location.

The character yu, composed of mian and yu, originally connotes "the space in which one exists" -- an interior space in which one can dwell and rest in peace.

Extended to the dimension of the mind and spirit, yu denotes the space in which the mind finds its rest. When this space attains the state of "tranquil settledness," celestial light naturally arises from it.

This connects to the dwelling concepts of the ancients as well. Early peoples, dwelling in caves or nests, sought nothing more than a stable, sheltering space. This secure space is yu. When yu is secure, one can live at peace, observe the heavens, understand nature, and apprehend the Way of Heaven. Here we find the lived-experience archetype of "When the inner universe is tranquil and settled, celestial light emanates."

Section 4: The Relationship between Yu and Yu ("To Lodge, To Entrust")

The character yu (universe/space) is also phonetically and semantically related to the character yu (to lodge, to entrust). Yu in this sense carries the meaning of sojourning, of entrusting something to a place. The Zhuangzi names one chapter "Yuyan" (Lodged Words), and says: "Lodged words make up nine-tenths; they borrow what is outside to speak of what is within." Yu thus means entrustment.

Might the yu of "the tranquil inner universe" also carry this nuance of yu -- entrustment$28 If so, the sentence could be understood as: when the place to which one's spirit is entrusted (yu) reaches a state of tranquil settledness, celestial light naturally arises from it.

This accords with the Zhuangzi, "Da Zongshi":

"Suppose you hide a boat in a ravine, or hide a mountain in a marsh -- you may call this secure. Yet in the middle of the night, a mighty man may come and carry them off on his back, and the sleeper will know nothing of it. Hiding small things in large ones may seem fitting, yet they can still escape. But if you hide all-under-heaven within all-under-heaven, there is no place for it to escape to. This is the great truth about the permanence of things."

To hide all-under-heaven within all-under-heaven is to entrust one's spirit to the Way of Heaven itself. When the spirit is no longer entrusted to finite things (boats, mountains) but to the infinite Way of Heaven (all-under-heaven hidden within all-under-heaven), there is no longer any possibility of loss. At that point, the place to which the spirit is entrusted (yu) has reached its ultimate settledness (tai ding).


Chapter Five: A Study of Tai Ding ("Tranquil Settledness")

Section 1: The Meaning of Tai

The character tai carries multiple meanings in pre-Qin texts.

First, tai means ease and security. The Yijing, Hexagram Tai, says:

"Tai: The small departs, the great approaches. Auspicious and prosperous."

The Tuan (Judgment) commentary says:

"Tai: The small departs, the great approaches. Auspicious and prosperous -- this means that Heaven and Earth interact and the myriad things communicate, that above and below interact and their wills are aligned. Within is yang and without is yin; within is strength and without is yielding; within is the noble person and without is the petty person. The Way of the noble person grows; the Way of the petty person wanes."

The hexagram image of Tai represents a state in which Heaven and Earth communicate, above and below are in harmony, and yin and yang are balanced. "Within is yang and without is yin; within is strength and without is yielding" -- inwardly vigorous and strong, outwardly gentle and yielding. This is precisely the state of "the tranquil inner universe."

Second, tai carries the meaning of openness and free passage. The phrase "Heaven and Earth interact and the myriad things communicate" in Hexagram Tai expresses this meaning.

Third, tai carries the meaning of spaciousness and ease. The Lunyu, "Zilu," says:

"The Master said: 'The noble person is at ease (tai) but not arrogant; the petty person is arrogant but not at ease.'"

Tai stands in contrast to arrogance (jiao). Tai is an inner spaciousness, composure, and serenity.

Section 2: The Meaning of Ding ("Settledness")

The character ding holds an extremely important position in pre-Qin philosophy.

The Daxue (Great Learning) says:

"After knowing where to stop, there is settledness (ding); after settledness, there can be stillness; after stillness, there can be peace; after peace, there can be deliberation; after deliberation, there can be attainment."

Yet Master Zhuang's ding differs from the Daxue's ding in that the latter is followed by "deliberation" and "attainment," whereas Master Zhuang's "tranquil settledness" leads directly to "celestial light" -- without the mediation of intellective "deliberation" and "attainment," it leaps directly into the radiance of the Way of Heaven.

Chapter 16 of the Laozi, "Attain the utmost emptiness; hold fast to utter stillness," is closest to this "tranquil settledness":

"Attain the utmost emptiness; hold fast to utter stillness. The myriad things arise together; I thereby observe their return."

"Attain the utmost emptiness" is the discipline of "the tranquil universe." "Hold fast to utter stillness" is the discipline of "settledness." When the two become one, this is "the tranquil inner universe."

Section 3: The Combined Meaning of Tai Ding

Tai and ding combine as "tranquil settledness," meaning: the ease, openness, spaciousness, and unshakable settledness of the inner universe.

This "tranquil settledness" is not a rigid, deathlike stillness, but a settledness brimming with vitality and free of obstruction. It is like the depths of the ocean -- on the surface, waves surge and crash; in the depths, all is profoundly still. Yet this stillness is not the stillness of stagnant water but the stillness of the abyss -- harboring inexhaustible power and possibility.

The Zhuangzi, "Tiandao" (The Way of Heaven), says:

"When water is still, it mirrors the whiskers and eyebrows with clarity. Its level is the standard of the carpenter's plumb line, and the great craftsman takes his rule from it. If water, being still, possesses such clarity, how much more the spirit! The mind of the sage is still: it is the mirror of Heaven and Earth, the looking glass of the myriad things."

The Zhuangzi, "Dechong Fu," further says:

"No one uses running water as a mirror; only still water serves. Only stillness can still all others that seek stillness."

Section 4: Comparison with Other Pre-Qin Doctrines of "Settledness"

The Guanzi, "Neiye," on ding:

"When the mind is settled within, the ears and eyes are keen and clear, and the four limbs are firm and strong -- it can serve as a lodging for vital essence."

This accords perfectly with the logic of "the tranquil inner universe leading to celestial light."

Master Meng on ding: Master Meng's "unperturbed mind" is a vigorous, substantive settledness based on "flood-like vital energy." Master Zhuang's "tranquil settledness" is a settled state of emptiness and free passage. The two move in different directions, yet both point toward the inner mind's unshakable settledness.

Master Xun on ding: Master Xun's "empty, unified, and still" (xu yi er jing), producing "great clarity and illumination," bears resemblance to Master Zhuang's "tranquil inner universe." Yet Master Xun aims at "knowing the Way" through intellection, while Master Zhuang aims at allowing the Way's radiance to arise naturally.


Chapter Six: A Study of "Celestial Light Emanates"

Section 1: The Meaning of "Emanates" (Fa)

The character fa here should be read as "to arise," "to issue forth," "to manifest." It is not a deliberate human activation but a natural arising -- like the sprouting of plants and trees, which is not the work of human effort but the spontaneous expression of the generative power of Heaven and Earth.

Section 2: The Meaning of "Celestial Light" (Tian Guang)

"Celestial light" is the radiance belonging to the Way of Heaven itself, a seeing that arises naturally and spontaneously, not produced by humanly contrived knowledge or wisdom.

In the Zhuangzi: The "Qiwu Lun" speaks of "the Guarded Light" (bao guang) -- preserving one's innate radiance -- and of "nothing better than to use clarity" (mo ruo yi ming). The "Zaiyou" chapter speaks of "the essence of the utmost Way" being "dim and dark," yet this darkness is not the absence of light but a "great light" transcending visible light -- as chapter 41 of the Laozi says: "The bright Way seems dim."

In the Laozi: Chapter 4 speaks of "tempering its brightness" (he qi guang). Chapter 52 distinguishes "light" (outward manifestation) from "illumination" (inner essence): "Use its light, and return to its illumination." Chapter 58 describes the sage as "bright but does not dazzle" (guang er bu yao) -- possessing radiance without being blinding.

In the Guanzi: "When virtue is complete, wisdom emerges, and all things are fully grasped" -- this logic is identical to "When the inner universe is tranquil and settled, celestial light emanates."

Section 3: Distinguishing "Celestial Light" from "Human Light"

"Human light" -- humanly contrived knowledge, cleverness, and discriminating judgment -- is limited, biased, and depleting. The Zhuangzi, "Yangsheng Zhu," warns: "To pursue the limitless with the limited -- that is perilous indeed." The "Qiwu Lun" describes how the discriminating mind leads to "daily consumption" and spiritual extinction.

By contrast, "celestial light" does not deplete the spirit. Like the sun and moon, which shine without effort, when one's inner universe reaches "tranquil settledness," celestial light arises spontaneously, requiring no additional expenditure of spiritual energy.

Section 4: Why Does "the Tranquil Inner Universe" Produce "Celestial Light"$29

Four levels of mechanism explain this:

First, remove the obstruction and clarity appears. The mind originally possesses celestial light; passions and views obscure it like clouds before the sun. Chapter 10 of the Laozi: "Cleansing and purifying your profound mirror -- can you make it free of blemish$30"

Second, when empty, it can receive. Chapter 11 of the Laozi: "It is the emptiness within that makes the room useful." When the mind is empty, celestial light can flow in.

Third, when still, it can illuminate. "When water is still, it mirrors the whiskers and eyebrows with clarity."

Fourth, when aligned with the Way, it communicates. Chapter 25 of the Laozi: "Humanity models itself on Earth; Earth models itself on Heaven; Heaven models itself on the Way; the Way models itself on naturalness."


Chapter Seven: A Study of "One's True Person Becomes Visible"

"From the emanation of celestial light, one's true person becomes visible." This sentence admits two readings that complement each other: others perceive the authentic person from whom celestial light emanates, and the cultivator perceives his own true nature.

The Zhuangzi, "Qiwu Lun," speaks of the "True Master" (zhen zai) hidden within -- "It has reality yet no visible shape." When celestial light emanates, this True Master naturally manifests.

The Zhuangzi, "Dechong Fu," depicts figures physically deformed yet full of inner virtue -- Wang Tai, Ai Tai Tuo -- who attract others not by their outward form but by the celestial light that emanates from their inner settledness. As Confucius says in the text: "It is not his form that they love; they love what gives his form its form."

The passage also carries political-philosophical implications. A ruler who achieves "the tranquil inner universe" and "emanates celestial light" governs without coercion. The Zhuangzi, "Ying Diwang": "The governance of the illumined king: his achievements cover all under heaven, yet they seem not to originate from himself." Chapter 17 of the Laozi: "The best rulers are those whose existence the people barely know."


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