The Essence of the 'Great Treatise A': A Philosophical Inquiry into the Gentleman's Establishment of Life and the Order of the *Yi*
This article deeply interprets the core proposition from the 'Great Treatise A'—'That which the gentleman dwells in and finds peace is the order of the *Yi*.' It examines how the gentleman, by internalizing the Way of Heaven and Earth and utilizing the *Book of Changes* as the foundation for establishing his life, achieves a state of 'auspiciousness without detriment' through observing the images and contemplating the textual explanations, situated within the Pre-Qin context and the Confucian tradition.

I. Why Are There Four Dimensions$13
We have analyzed the individual meanings of "Image" (Xiang), "Word" (Ci), "Change" (Bian), and "Divination" (Zhan). Let us now consider them holistically: Why did the Xì Cí Zhuàn posit these four dimensions$14 What is their relationship$15
Recall the definitions:
- Image (Xiang): The visual symbolic system of the Yi (Hexagram Images, Line Images).
- Word (Ci): The linguistic expressive system of the Yi (Hexagram Judgments, Line Judgments).
- Change (Bian): The dynamic operational system of the Yi (Hexagram Changes, Line Changes).
- Divination (Zhan): The practical application system of the Yi.
These four dimensions constitute a complete framework for cognition and practice:
Image (Symbol) → Word (Language) → Change (Dynamic) → Divination (Application)
From "Image" to "Word" is the process of translation from symbol to language. From "Word" to "Change" is the elevation from static comprehension to dynamic grasp. From "Change" to "Divination" is the transformation from theoretical cognition to practical application.
Simultaneously, these four are not isolated or linear but dialectically unified:
- Observing Images aids in understanding Words—seeing the hexagram image makes it easier to grasp the meaning of the Hexagram Judgment and Line Judgment.
- Contemplating Words aids in deeply observing Images—by savoring the content of the Words, one can discover the deeper significance of the Images.
- Observing Changes aids in flexibly applying Words—only by seeing the change can one know how to flexibly interpret and use the Words.
- Contemplating Divinations aids in verifying Images—through actual divination and verification, one can deepen the understanding of the Images in return.