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.

IX. Conclusion
"Whereby Heaven assists him, and everything auspicious brings no harm" is not an empty blessing but a description of the ultimate state reached after the Gentleman performs a series of efforts: cultivating the Yi through self-cultivation, observing Images, contemplating Words, observing Changes, contemplating Divinations, treading on trustworthiness, contemplating compliance, and honoring the worthy. It reflects the core spirit of Pre-Qin thought: Man does not passively accept the Mandate of Heaven but actively elicits Heaven's aid through his own virtue and wisdom.