Xunzi's 'Jie Bi' (Unveiling Concealment): On the Wholeness of the Dao, Cognitive Limitation, and the Fortune of Being Unobstructed

Section 1: The Philosophical Connotation of "The Dao is Constant in its Substance Yet Endlessly Changing" (道者体常而尽变)

After criticizing the obstructions of Master Mozi, Master Songzi, Master Shenzi, Master Shenzi, Master Hui, and Master Zhuangzi, Master Xunzi offers a summary judgment:

"These several schools are all but one corner of the Dao. The Dao is constant in its substance yet endlessly changing in its manifestations; one corner is insufficient to encompass it." (此数具者，皆道之一隅也。夫道者体常而尽变，一隅不足以举之。)

These two sentences are the pivot of the entire passage and constitute the core proposition of Master Xunzi’s theory of the Dao. Let us analyze them word by word.

"These several schools" (此数具者)—"This" refers to the doctrines of the schools mentioned above; "several" (shu, 数) denotes multiple in number; "all" (ju, 具) is synonymous with "together" (ju, 俱). Taken together, it means "these few schools (and their doctrines)."

"are all but one corner of the Dao" (皆道之一隅也)—"Corner" (yu, 隅) means a corner or angle. The Analects, "Shu Er" (述而), states: "If I hold up one corner and they cannot come back with the other three, I will not go over it again." (举一隅不以三隅反，则不复也。) A square room has four corners; if you see only one, you might assume the entire room is like that. Master Xunzi says each school's doctrine is "one corner of the Dao," meaning each saw only one corner or one side of the Dao.

However, a crucial question arises here: Why is what each school saw merely "one corner" rather than the whole$18 This requires understanding Master Xunzi’s definition of the Dao's essence.

"The Dao is constant in its substance yet endlessly changing in its manifestations" (夫道者体常而尽变)—This statement is extremely concise and requires layered analysis.

First, "Substance is Constant" (Ti Chang, 体常). "Ti" means substance or foundation. "Chang" means constant or unchanging. "Ti Chang" means that the Dao's substance is eternally constant. This highly echoes what Master Laozi said. Master Laozi states: "There was something, indistinctly formed, born before Heaven and Earth. Empty, silent, standing alone, never changing, revolving everywhere, never exhausted, it may be the mother of all under Heaven." (Laozi, Chapter 25) "Standing alone, never changing" is "Ti Chang." He also says: "The Dao that can be told is not the eternal Dao." (Laozi, Chapter 1) The "constant Dao" (Chang Dao) here also resonates with Master Xunzi's "Chang." For the Dao to be the Dao, it must possess an unchanging, constant nature, otherwise it cannot be the Dao.

However, if the Dao were only "constant in its substance"—only unchanging—it would be a static, dead thing, unable to account for the ever-changing reality of the world. Therefore, Master Xunzi immediately follows this by saying "endlessly changing" (Jin Bian, 尽变).

"Endlessly Changing" (Jin Bian, 尽变). "Jin" means exhausted or encompassing everything. "Bian" means change. "Jin Bian" means the Dao’s manifestations encompass all change—the transformation of Heaven and Earth, human affairs, the waxing and waning of Yin and Yang, the cycling of the four seasons—all change is within the scope of the Dao. The Dao is not only unchanging; the Dao is also the source and destination of all change.

This forms a delicately balanced dialectical structure: the Dao is both "Constant" (unchanging) and "Changing" (encompassing all change). The constant and the changing are unified at the level of the Dao.

This unification of "Constant" and "Changing" has deep intellectual roots in pre-Qin texts.

The I Ching, Xi Ci Shang (系辞上), states: "One Yin and one Yang, this is the Dao." The alternation and transformation of Yin and Yang are the Dao’s form of manifestation; yet the principle of this operation, "one Yin and one Yang," is constant. This is constant inherent in change, and change encompassed within the constant.

Again, the I Ching, Xi Ci Shang, states: "The Yi has the Taiji (Supreme Ultimate); this generates the two Liangyi (Two Principles); the Liangyi generate the four Sixiang (Four Images); the Sixiang generate the eight Baguai (Eight Trigrams)." (Yi you Taiji, shi sheng liangyi, liangyi sheng sixiang, sixiang sheng baguai.) The Taiji is the Dao's substance; it is constant. However, from the Taiji arise the Liangyi, Sixiang, and Baguai, giving rise to all things—this is "endless change."

Master Laozi’s Chapter 42 states: "The Dao produces One; One produces Two; Two produces Three; Three produces all things." (Dao sheng yi, yi sheng er, er sheng san, san sheng wanwu.) The Dao is the source of "One," and "all things" are the unfolding of the Dao. From the Dao to all things is a process from the "Constant" to the "Changing"; yet since all things are generated by the Dao, and the Dao resides within all things, the change ultimately returns to the constant—this is "endless change" without departing from the "constant substance."

Having understood "constant in substance yet endlessly changing," we can see why each school only grasped "one corner." The "constant substance" aspect of the Dao manifests as certain unchanging principles—such as the principle of "Utility" (Yong), the principle of "Law" (Fa), the principle of "Heaven" (Tian), etc. Each school grasped one of these constant principles, believing it to be the entirety of the Dao. However, they ignored the Dao's "endlessly changing" aspect—its manifestations encompass all change and thus cannot appear in only one form. Adhering only to the principle of "Utility" prevents one from understanding the changes encompassed by "Culture"; adhering only to the principle of "Heaven" prevents one from understanding the changes encompassed by "Man."

To use a modern analogy, this is like observing water. Water is liquid at room temperature, solid at low temperatures, and gaseous at high temperatures. If a person has only ever seen liquid water, they might assume water is only liquid—they have seen only "one corner of water." The essence of water ("Ti Chang") is constant, but its form of manifestation ("Jin Bian") is diverse. To claim one form is the whole of water is "Bi."

Returning to the pre-Qin intellectual context, we can use another passage from Laozi to echo Master Xunzi’s "Constant in Substance yet Endlessly Changing":

"Great squareness has no corners; great vessels are finished late; great sounds are rare; great images have no form. The Dao is hidden and nameless." (Laozi, Chapter 41)

"Great squareness has no corners" (大方无隅)—This serves as the perfect footnote to the critique of the "one corner" view: the Dao, as "great squareness," has no corners—it is perfectly integrated and indivisible into corners. Yet, the various masters insisted on cutting out a "corner" from the Dao and claiming it was the whole. Master Laozi says "Great squareness has no corners," and Master Xunzi says "one corner is insufficient to encompass it"—both echo each other, revealing the wholeness and indivisibility of the Dao.

If the Dao is the wholeness of "Constant Substance yet Endless Change," is it possible for man to fully cognize it$19 Or is human cognition inherently limited, destined only to see "one corner"$20

Master Xunzi’s answer to this is optimistic and resolute: man can know the entirety of the Dao. The key to this answer lies in the cognitive method he proposes: "empty, unified, and still" (Xu Yi Er Jing). This method prevents the mind from being obscured by preconceived biases, thus allowing it to penetrate the entirety of the Dao. And the reason Master Confucius was "benevolent, wise, and yet unobscured" is precisely because he practiced this cognitive state of "empty, unified, and still."