Interpreting and Investigating the Chapter: 'The Sage Perceived the Profundities of the World' — The Primordial Code of *Xiang* and *Yao*
This paper deeply investigates the core proposition, 'The Sage perceived the profundity (Ze) of the world,' within the *Xi Ci Zhuan* (Commentary on the Appended Judgments) of the *Zhou Yi*, analyzing the original Pre-Qin semantics of 'Ze,' 'Xiang' (Image), and 'Yao' (Line). It focuses on explaining the cognitive leap of the Sage through 'looking up and observing down,' transforming deep textures (Ze) into external simulations (Xiang), and reveals the intrinsic connection between the 'Yao' and ancient ritual systems, thereby reconstructing the foundation of Yi learning theory.
III. The Dynamic Essence of the Yao
The Xiang is a static representation of structure; the Yao is a dynamic representation of process. This distinction can be confirmed by examining the actual practice of divination.
When we use the yarrow stalk method to cast a hexagram, we obtain a "primary hexagram" (běn guà, 本卦) and several "changing lines" (biàn yáo, 变爻). The overall image of the primary hexagram is the Xiang, while the specific changing lines are the Yao. The position of the changing line indicates the key node in the current situation where change is occurring.
For example, obtaining the Tai Hexagram (Earth over Heaven, ☷☰) with the 3rd line changing. The "Xiang" tells us: the current situation is one of peace and accord where Heaven and Earth communicate. The "Yao" (the 3rd line) tells us: within this overall peaceful structure, the position of the 3rd line is undergoing change—specifically, the yang energy is rising from the highest position of the lower trigram, about to enter the realm of the upper trigram. The 3rd line statement reads: "There is no flat ground that is not eventually sloped; there is no going that does not return. Perseverance in difficulty incurs no blame." This means: there is no eternally level road, nor a journey that only goes out and never returns—within the peace of Tai, the seed of transformation is already contained.
This is the subtlety of the Yao: It not only tells you the current structure (the Xiang), but also where the structure is changing and in what manner (the Yao), and whether the trend of this change is auspicious or inauspicious (the Statement).