The Tai Shi Yuan Evil that An Jing possesses is the origin of fractals, not involved in material changes, but rather the initial manifestation of concepts and their representative essence. It governs the Tai Shi, determining the shape and concept of all things, akin to the imagined apple which has form without substance. Whereas Taisu determines the concrete form and substance of all things, like the real apple that can be touched, thus no phenomenon is needed.
A simpler analogy: Tai Shi is the concept of Yin Yang and the Five Elements — ascending growth, cold desolation, silent gathering, burning creation — while Taisu is the tangible substances of the Sun, Supreme Yin, metal, wood, water, fire, and earth. The former is akin to thought, able to transform its specific nature at will, while the latter excels in creation, yet once created, becomes as unchangeable as words written in ink.
