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A Deep Study of Xunzi's 'Jie Pi' Chapter: On the Cognitive Foundations of the Mind—Emptiness, Unity, and Tranquility

This paper provides an in-depth analysis of the core proposition in Xunzi's 'Jie Pi' concerning the nature of cognition: 'How does man know$41 By the mind. How does the mind know$42 By being empty, unified, and tranquil.' It systematically interprets the dialectical relationship and philosophical implications of 'emptiness' (xu), 'unity' (yi), and 'tranquility' (jing) in cognition, tracing their ancient intellectual origins to reveal the systematicity and sophistication of Pre-Qin cognitive theory.

Tianwen Editorial Team February 16, 2026 58 min read PDF Markdown
A Deep Study of Xunzi's 'Jie Pi' Chapter: On the Cognitive Foundations of the Mind—Emptiness, Unity, and Tranquility

Chapter Eight: Concentration on the Dao (Yi Yu Dao) – From Cognition to Practice

Section 1: The Fundamental Distinction Between "Excellence in Things" and "Excellence in the Dao"

Master Xunzi presents an extremely important distinction in this passage:

"The farmer is excellent in the fields, but cannot be the teacher of farming; the merchant is excellent in the market, but cannot be the teacher of the market; the artisan is excellent in his craft, but cannot be the teacher of crafts. There is a person who possesses none of these three skills, yet can be made to govern the three offices. This is called one who is excellent in the Dao. There are those excellent in things. Those excellent in things manage things by things (yi wu wu 以物物); those excellent in the Dao manage things by encompassing them (jian wu wu 兼物物)."

The core of this passage is the difference between "Excellence in things" (jing yu wu) and "Excellence in the Dao" (jing yu dao).

"Excellence in things" is mastery of a specific, concrete domain. Farmers master agriculture, merchants master trade, artisans master craft—they each reach a high level in their respective fields.

But those "excellent in things" have a fundamental limitation: they can only function within their area of expertise and cannot govern the whole picture. A farmer cannot manage the Ministry of Agriculture ("teacher of farming"), a merchant cannot manage commerce ("teacher of the market"), and an artisan cannot manage industry ("teacher of crafts"—qi shi 器师)—because governance requires not just mastery of specific techniques, but also comprehension of the whole situation and understanding of fundamental principles.

"Excellence in the Dao" is mastery of the fundamental principle. The "Dao" is the universal principle that permeates all specific domains—it is not a specific skill, but the general principle that allows all skills to find their proper place.

Those excellent in things manage specific affairs using specific methods ("managing things by things"). Those excellent in the Dao are able to oversee all specific affairs ("encompassing them all").

The profound implication here is that "Singularity" (Yi) exists on different levels. Focusing on things (Yi Yu Wu) and focusing on the Dao (Yi Yu Dao) are both forms of "Singularity," but they are of entirely different orders. Focusing on things leads to mastery of one thing; focusing on the Dao leads to the ability to govern all things.

Section 2: Why Can Those "Excellent in Things" Not Be "Teachers"$2

This is a question demanding deeper inquiry.

A farmer is an expert in cultivation, so why can he not manage the agricultural department$3 Because managing agriculture requires knowledge far beyond mere cultivation—it involves personnel arrangement, resource allocation, disaster response, institutional construction, and so on. A person skilled only in cultivation lacks these higher-level capacities.

More fundamentally, the "Singularity" of those "excellent in things" is a limited "Singularity"—they focus entirely on their specialty, leading to insufficient knowledge of other domains. This focus allows them to reach high levels in their own area but simultaneously limits their perspective.

The "Singularity" of those "excellent in the Dao" is a transcendental "Singularity"—they focus their attention on the "Dao," the fundamental principle that runs through all domains. Therefore, even if they are not experts in any single specific skill, they possess a deep understanding of the fundamental principles governing all things, enabling them to govern everything from a higher level.

This principle has wide resonance in pre-Qin texts.

Master Kong said in the Analects:

"The Gentleman is not a utensil." (Analects, Chapter 2.12)

The Gentleman should not be like a utensil, having only one specialized use. Utensils each have their use—a bowl for food, a cart for transport—but the Gentleman should not be confined to one specialized function. The Gentleman should grasp the "Dao" and use it as the foundation to respond flexibly to all different situations.

This is entirely consistent with Master Xunzi’s view—those "excellent in things" are "utensils," while those "excellent in the Dao" are the Gentlemen who are "not utensils."

Master Laozi said:

"The Dao gives them life; Virtue nourishes them; Things give them form; Position brings them to completion. Thus, the myriad things honor the Dao and esteem Virtue." (Dao De Jing, Chapter 51)

The Dao generates all things, Virtue nurtures them, things give them form, and position completes them. All things revere the Dao and esteem Virtue. "Things" are merely manifestations of the Dao. Those excellent in things only see one specific manifestation of the Dao; those excellent in the Dao grasp the Dao itself.

Section 3: "Concentrating on the Dao brings rectitude; verifying things with it brings clarity."

"Therefore, the Gentleman concentrates on the Dao (Yi yu Dao), and uses this to verify and measure things (zan ji wu). Concentrating on the Dao brings rectitude (zheng); verifying things with it brings clarity (cha); with rectified will and clear judgment, one can govern all things."

This passage reveals two effects of "Concentrating on the Dao":

First, "Rectitude" (Zheng). Concentrating on the Dao leads to rectified will. Rectitude is the unity of moral uprightness and cognitive accuracy. The Mind is neither leaning nor skewed, neither tempted by material desires nor obscured by prejudice.

Second, "Clarity" (Cha). Using the Dao to verify things brings clarity. Zan means assist or reference; Ji means to examine or verify. Using the Dao as a standard to verify specific things allows one to accurately judge the right and wrong, good and evil, of those things.

Rectitude and Clarity combine to form "rectified will in action and clear judgment in discourse" (zheng zhi xing cha lun). Once this is achieved, "all things assume their proper offices" (wan wu guan yi 万物官矣). Guan here means governance or arrangement—when all things attain their "office" (position and function), the world is well-governed.

Section 4: The Exemplar of Emperor Shun

Master Xunzi cites Emperor Shun as the paradigm of "Concentrating on the Dao":

"In antiquity, when Shun governed the world, all things were accomplished without him issuing orders for every affair."

When Emperor Shun governed the world, he did not need to issue decrees for every specific task, yet everything was naturally accomplished.

How could Master Shun achieve this$4 Because he "Concentrated on the Dao" (Yi Yu Dao)—he grasped the fundamental Dao of governance. With the guidance of the Great Dao, the specific affairs would naturally operate in an orderly manner.

Here lies a profound wisdom of governance: the best ruler is not the one who micromanages every task, but the one who can grasp the broad direction, establish excellent institutions, and select worthy officials. He does not need to plow the fields, trade in the market, or build crafts (these are the tasks of those "excellent in things"); he only needs to ensure that those who plow, trade, and build are each in their proper place and fulfilling their duties.

Master Kong also praised Shun’s governance similarly:

"Who was there who governed by non-action$5 It must have been Shun! What did he do$6 He merely respected himself and faced south (the posture of the ruler)." (Analects, Chapter 15.5)

"Respecting himself and facing south" is the manifestation of "Concentrating on the Dao" in governance. Master Shun did not busy himself with specific tasks but inspired the world through his own uprightness and guided the officials through the Dao.

Section 5: "Dwelling in One Critical Point" and the "Subtlety of the Dao Mind"

Master Xunzi then quotes a crucial ancient teaching:

"Dwelling in one critical point (chu yi wei zhi 处一危之), its glory becomes full and secure; nurturing one subtle point (yang yi zhi wei 养一之微), glory is attained, yet it is unknown. Therefore the Dao Classic says: 'The Human Mind is perilous (wei 危); the Dao Mind is subtle (wei 微).' The subtle juncture (ji 几) between peril and subtlety, only the enlightened Gentleman can know."

This passage contains the core teaching: "The Human Mind is perilous; the Dao Mind is subtle." The "subtle juncture" (wei wei zhi ji) is the infinitesimal boundary between the peril of the human mind and the subtlety of the Dao Mind. A slight lean toward the "human mind" leads to danger; grasping the "Dao Mind" leads to subtle attainment. Only the Enlightened Gentleman (Ming Junzi) can perceive and grasp this juncture. Here, Ming refers to the "Clarity and Brightness" achieved through cultivation—only one who has reached the state of "Great Clarity and Brightness" possesses the capacity to distinguish between the "perilous human mind" and the "subtle Dao mind."

Section 6: The Deeper Significance of the Water Tray Analogy

Master Xunzi offers the famous "Water Tray Analogy" in this section:

"Thus the Human Mind is like water in a shallow tray. If placed correctly and not stirred, the muddy sediment settles below, and the clear brightness remains above; it is then sufficient to see the eyebrows and hair and discern principles. If a slight breeze passes over it, the sediment below stirs, and the clear brightness above becomes chaotic, so that one cannot capture the true form. The Mind is just like this."

The subtlety of this metaphor lies in several points:

First, water itself contains both "sediment/turbidity" (zhan zhuo 湛浊) and "clear brightness" (qing ming 清明)—just as the Mind contains components of the "perilous human mind" and the "subtle Dao mind." Water is neither purely clear nor purely turbid, and the Mind is not purely good or purely evil.

Second, the key is "placed correctly and not stirred" (zheng cuo er wu dong 正错而勿动)—if the conditions are right (still and level), the turbid naturally sinks, and the clear naturally rises. Similarly, if the Mind is in a state of "Emptiness, Singularity, and Stillness," the "perilous" components naturally quiet down, and the "subtle" aspects naturally manifest.

Third, "if a slight breeze passes over it"—even the smallest interference can disturb the clarity. The Mind is extremely sensitive; any minor external object, desire, or emotion can disrupt its tranquility, causing it to lose its capacity for clear judgment. This is why the cultivation of "Emptiness, Singularity, and Stillness" requires such refinement—because the sources of "obscuration" are ubiquitous and constant.

Fourth, "so that one cannot capture the true form"—once disturbed, it loses not only the grasp of detail but even the basic outline. This illustrates what happens when "drawn away by small things, its rectitude is externally compromised; if its inner core leans, it is insufficient to resolve even crude principles."

Historically, the decline of many states occurred because rulers were drawn away by "small things"—indulging in sensual pleasures, trusting sycophants, chasing short-term minor gains while ignoring long-term great plans—ultimately leading to a complete loss of judgment and the state's ruin.

Section 7: The Cultural Tradition of the "Mirror" (Jian)

In ancient culture, using a "water tray" (jian) to reflect one's appearance has a long history, predating widespread use of bronze mirrors. Ancient people used bronze bowls filled with water to see their reflections.

The Book of Documents, Kao Yü states:

"Do not use water as a mirror for your appearance, but use the people as a mirror for your politics."

The water mirror here is the water tray mirror. This tradition endowed the water's surface with a special symbolic meaning: the water surface symbolizes the "Mind"—it can reflect all things, but only if it is calm and clear.

Master Xunzi’s water tray analogy draws upon this deep cultural tradition. He chooses the image not arbitrarily but because it carries profound cultural weight, revealing the fundamental relationship between the Mind and cognition—the prerequisite for "seeing" (jian) is the Mind's calm and clarity.

Master Zhuangzi also used a similar image in De Chong Fu (The Virtue of the Perfect Man):

"Confucius said: 'No one uses flowing water as a mirror, but still water. Only stillness can make others still.'"

Master Kong said: people use still water as a mirror, not running water. Only when one is still oneself can one cause others to be still. This logic aligns perfectly with Master Xunzi’s water tray analogy—"Stillness" is the prerequisite for "Seeing" (clear cognition).

Section 8: Models of Singularity: Cangjie, Houji, Kui, and Shun

Master Xunzi presents four models of "Singularity":

"Thus, many have loved writing, but only Cangjie is transmitted: this is Singularity. Many have loved farming, but only Houji is transmitted: this is Singularity. Many have loved music, but only Kui is transmitted: this is Singularity. Many have loved righteousness, but only Shun is transmitted: this is Singularity."

Many people loved writing, but only the name of Master Cangjie has been passed down—because of his "Singularity." Many loved farming, but only Master Houji is transmitted—because of his "Singularity." Many loved music, but only Master Kui is transmitted—because of his "Singularity." Many loved righteousness, but only Master Shun is transmitted—because of his "Singularity."

These four examples cover four domains: culture (writing), production (farming), art (music), and morality (righteousness). In every field, numerous individuals participated, but only those who achieved "Singularity"—ultimate focus—reached the highest achievement.

These examples are deeply connected to ancient culture:

Master Cangjie is the legendary inventor of written script. The preface to the Shuowen Jiezi cites ancient tradition saying Cangjie "first created characters." The invention of writing is one of the most significant events in human history. Cangjie could create writing precisely because he concentrated his entire spirit on observing the forms of Heaven, Earth, and all things, and searching for symbols to express them—this is the ultimate expression of "Singularity."

Master Houji is the ancestor of the Zhou people and the legendary god of agriculture. Shi Jing, Daya, Sheng Min details Houji's life from birth to the founding of agriculture. Houji showed a natural affinity and focus on crops from childhood—this is the manifestation of "Singularity" in ancient agricultural myths.

Master Kui was the Minister of Music under Shun. Shang Shu, Shun Dian records: "The Emperor said: 'Kui! I command you to take charge of music and instruct the noble youth. Be straightforward yet warm, broad yet strict, firm yet not tyrannical, simple yet not arrogant.'" Master Kui's dedication to music made him the greatest musician of antiquity.

Master Shun is the paradigm of the ancient sage-king. His lasting fame in "Righteousness" (Yi) stems from concentrating his entire spirit on practicing the Way of Benevolence and Righteousness—regardless of poverty or wealth, regardless of circumstances, he steadfastly upheld the principle of righteousness.

Section 9: "From antiquity until now, there has never been one who used two minds and achieved excellence."

"From antiquity until now, there has never been one who used two minds and achieved excellence."

This conclusion, drawn after citing numerous examples, is forceful: throughout history, no one who divided their mind achieved mastery in any one skill.

The power of this conclusion lies in its universality—"from antiquity until now," covering all historical experience—and its absolute negation—"there has never been."

Yet, we must ask: Is this conclusion too absolute$7 Do multi-talented individuals not exist$8

Master Xunzi’s response is that while multi-talented people exist, they achieved success in multiple areas not by dividing their attention among them simultaneously, but by being "Singular" about different objects at different times. When learning calligraphy, they devoted their entire mind to calligraphy; when learning music, they devoted their entire mind to music—each instance was an act of "Singularity," though the object of focus changed.

More fundamentally, true "multi-talented excellence" originates from "Concentration on the Dao." Once a person grasps the fundamental Dao, they can rapidly master any specific field—because the Dao permeates all domains. This is why "those excellent in the Dao encompass all things."