Chapter Three: Dong (Movement) — The Generative Impulse of All Under Heaven

I. The Transition from Ze to Dong

The latter half of the passage transitions from "the profundity of all under heaven" to "the movements of all under heaven":

"The sage has the means to perceive the movements of all under heaven, and observes where they converge and connect, so as to carry out the canonical rites, appending statements to determine what is auspicious or inauspicious — therefore these are called yao."

This transition is of paramount importance, yet is often overlooked. Many commentators conflate ze and dong, treating them as mere variants of the same idea. But upon careful analysis, the two differ in essence:

Ze is static — it describes the hidden textures and deep structures of the myriad things, a question at the level of "being."Dong is dynamic — it describes the movements, changes, and interactions of the myriad things, a question at the level of "process."

In other words, ze answers "what is the world like$14", while dong answers "how does the world change$15" The former concerns structure; the latter, process. The former is expressed through xiang; the latter, through yao.

This distinction carries profound theoretical significance in the history of Yijing studies. It reveals the dual nature of the Zhouyi: the Zhouyi is simultaneously a "picture" of cosmic structure (xiang) and a "process" of cosmic change (yao).

Consider: why does each of the sixty-four hexagrams possess both a "hexagram image" and "line statements"$16 Why can there not be images without line statements, or line statements without images$17 It is because xiang describes only structure, while yao describes how that structure unfolds and changes through time. Neither can be dispensed with; together they constitute the complete Yi.

II. The Pre-Qin Semantics of Dong

Dong (动, movement) in the pre-Qin canon is a concept of extraordinarily rich content.

Its most basic meaning is "physical movement." The Most High (Laozi), Chapter 26: "The heavy is the root of the light; the still is the lord of the restless" (zhong wei qing gen, jing wei zao jun). Here "restless" (zao) is synonymous with dong. But at a deeper philosophical level, dong points to all change, all interaction, all transformation.

The Xi Ci Xia Zhuan says:

"The firm and the yielding push against each other and generate change." (Gang rou xiang tui er sheng bianhua.)

"Pushing against each other" (xiang tui) is the concrete unfolding of dong — yin and yang push against each other, the firm and the yielding push against each other, heaven and earth push against each other, and from this pushing, change is born.

The Xi Ci Shang Zhuan further says:

"The alternation of the one yin and the one yang — this is called the Way. What continues it is goodness; what completes it is nature." (Yi yin yi yang zhi wei dao, ji zhi zhe shan ye, cheng zhi zhe xing ye.)

The alternation of yin and yang is the most fundamental dong — it is not that some particular thing is moving, but that the alternation between yin and yang is itself dong.

Therefore, "the movements of all under heaven" does not mean that some things under heaven are moving while others are not, but that all the myriad things, without exception, move and change within the great rhythm of yin-yang alternation. This dong is universal, fundamental, and ceaseless.

The Lunyu (Zihan) records the Master's lament at the riverbank:

"The Master stood by the river and said: 'What passes is like this — it does not cease day or night!'" (Zi zai chuan shang yue: shi zhe ru si fu, bu she zhou ye.)

This profound apprehension of universal flux is the most direct experiential encounter with "the movements of all under heaven." The water flows without ceasing, time does not stop, all things are in the midst of change — this is the simplest contemplation of "the movements of all under heaven."

III. Why Is "Perceive" (Jian) Used for Both Ze and Dong$18

It is noteworthy that the text uses the same character jian for both ze and dong. "The sage has the means to perceive the profundity of all under heaven" and "the sage has the means to perceive the movements of all under heaven" — the two instances of jian are identical.

This tells us that in the view of the Xi Ci Zhuan's author, whether grasping the deep structure of the world (ze) or grasping its processes of change (dong), the same cognitive capacity is required — intuitive insight. The sage does not arrive at the conclusion that "the world is moving" through logical inference; rather, he "perceives" it through direct contemplation.

But after this perception, the methods of processing differ. For ze, the sage's method is "fashioning likenesses of their forms and appearances, imaging what is fitting for each thing" — image-taking. For dong, the sage's method is "observing where they converge and connect, so as to carry out the canonical rites, appending statements to determine what is auspicious or inauspicious" — a more complex process.