Between Efficacy and Image: A Radical Inquiry into the Roots of the Yi Dao's Manifest and Subtle
This article offers an in-depth analysis of the core proposition of 'yao effecting and xiang imaging' in the Xici zhuan (Great Commentary) of the Zhouyi, examining the dynamic and static distinction between 'effecting' and 'imaging,' tracing the referent of 'this,' and elucidating how yao and xiang constitute the epistemological framework through which the Way of the Yi reveals the subtle and the manifest.

Chapter Six: The Four-Tiered Progressive Architecture — A Cognitive Ladder from Effecting to Discerning the Sage's Sentiments
I. Reexamining the Structural Logic of the Entire Passage
Let us now step back and survey the four-tiered progressive structure of this passage as a whole:
| Tier | Original Text | Key Term | Theme |
|---|---|---|---|
| First | The yao is that which effects this | Effecting | The essence of yao — dynamic modeling |
| Second | The xiang is that which images this | Imaging | The essence of xiang — configurational presentation |
| Third | When yao and xiang move within, fortune and misfortune appear without | Within/Without | Operational mechanism — the subtle-to-manifest transformation |
| Fourth | Achievement and enterprise are seen through change; the sage's sentiments are seen through the judgments | Change/Judgments | Practical significance — world-ordering and discerning the sage's sentiments |
These four tiers progress from the microscopic to the macroscopic, from ontology to praxis, from the Way of heaven to the affairs of humanity, composing a complete cognitive ladder:
Step one: understand the essence of the yao — it is the modeling-after of heaven-and-earth's movement.Step two: understand the essence of the xiang — it is the imaging of heaven-and-earth's configurations.Step three: understand how yao and xiang operate — internal movement produces external fortune and misfortune.Step four: understand the destination of the Yi Dao — enterprise is achieved through adaptive change; the sage's sentiments are revealed through the judgments.
These four steps can also be understood as four levels of initiation into the Zhouyi:
The beginner first studies the yao — learning the basic meanings and rules of change for yin and yang lines. Then studies the xiang — understanding the symbolic system of the Eight Trigrams and sixty-four hexagrams. Then studies the principle of inner and outer — grasping the correspondence between hexagram images and reality. Finally apprehends "change and the judgments" — penetrating the sage's wisdom of timely adaptation and savoring the profound sentiment embedded in the judgments.
II. Intertextuality with Other Core Propositions in the Xici zhuan
This passage does not stand in isolation; it forms a rich intertextual web with other core propositions in the Xici zhuan.
Intertextuality with "one yin and one yang — this is called the Dao": The "this" in "the yao is that which effects this," traced to its root, is precisely the "Dao of one yin and one yang." The binary division of lines into yin and yang is itself the modeling-after of this fundamental Dao.
Intertextuality with "what is above form is called the Dao; what is below form is called an implement": The image (xiang) serves as an intermediary between "Dao" and "implement" — the image is neither purely metaphysical (Dao) nor purely physical (implement), but a bridge between the two. "The xiang is that which images this" — the image images the Dao, and simultaneously images the implement.
Intertextuality with "manifesting through benevolence, concealing in function": "Yao and xiang move within" corresponds to "concealing in function" — the hidden operational mechanism. "Fortune and misfortune appear without" corresponds to "manifesting through benevolence" — the visible educative function. The Xici zhuan (Part I) states: "Manifesting through benevolence, concealing in function, drumming up the myriad things yet not sharing the sage's anxiety — how perfect are its flourishing virtue and great enterprise!" The Way of heaven "drums up the myriad things yet does not share the sage's anxiety" — the Way of heaven impartially drives the operations of all things, but the sage carries anxiety — anxiety for the order and disorder of the world, for the security and suffering of the people. This "anxiety" is the sage's qing.
Intertextuality with "penetrating change is called 'affairs'; the unfathomable in yin and yang is called 'spirit'": The "change" in "achievement and enterprise are seen through change" is precisely the "change" in "penetrating change is called 'affairs.'" To change and thereby penetrate, to penetrate and thereby endure, to endure and thereby achieve enterprise — this is the fundamental logic of the sage's worldly governance.
III. Echoes Among the Pre-Qin Masters
The intellectual framework this passage reveals has had far-reaching influence not only within the Confucian tradition but also finds echoes in other schools among the pre-Qin masters.
The Confucian echo: The Master's discussions of the Yi ultimately come to rest on the adaptation to change in human affairs and the cultivation of moral character. The Lunyu (Shu er) records: "The Master said: 'Give me a few more years — if at fifty I could study the Yi, I might thereby be without great fault.'" "Without great fault" — not the pursuit of great wealth and honor, but the avoidance of serious errors. This is precisely the practical interpretation of "fortune and misfortune appear without" — the purpose of studying the Yi is to make the most correct judgments possible amid the complex vicissitudes of human affairs and to avoid mistakes.
The Daoist echo: Chapter 40 of the Laozi states: "Reversal is the movement of the Dao. Weakness is the function of the Dao." "Reversal" (fan) is the fundamental mode of the Dao's movement — all things move toward their opposites. This is entirely congruent with the logic of yin-yang mutual transformation in the Zhouyi. The reason the yao must "effect" the movements of heaven and earth is precisely because the core pattern of those movements is the mutual transformation of yin and yang. The Most High's "reversal is the movement of the Dao" and the Xici zhuan's "the firm and the yielding push against each other and generate transformation and change" may be called streams from the same source.
The military echo: The Sunzi bingfa (The Art of War, "Void and Solid") states: "The disposition of troops has no permanent configuration, just as water has no permanent shape. One who can achieve victory by adapting to the enemy's changes may be called divine (shen)." "Adapting to the enemy's changes" — this is precisely the military interpretation of "achievement and enterprise are seen through change." The essence of military strategy lies in adapting to the time and the situation, never clinging rigidly to fixed formations and tactics. Sunzi's "divine" and the Xici zhuan's "the unfathomable in yin and yang is called 'spirit'" are kindred in spirit.
Echoes in the School of Names and the Mohists: Although the School of Names and the Mohists are not known for their Yi studies, their concern with the "relationship between names and actualities" has a deep-level connection to the proposition "the xiang is that which images this." Whether names correspond to actualities — whether designations faithfully "image" the reality of things — is a universal concern in pre-Qin thought. The "Ten Propositions on Things" of Hui Shi, with their seemingly paradoxical assertions (such as "heaven and earth are equally low; mountains and marshes are equally level"), actually challenge the reliability of everyday "images" — do the "images" we perceive truly and faithfully "image" the original face of things$37