He notes that in the Yi Jing it is written: "The lines change and move without resting in one place, moving into any one of the six places of the hexagram. They ascend and descend, ever inconstant. The strong and the weak lines change places, so that an invariable rule cannot be derived from them. It must vary as their changes indicate."
他表示，《易經》〈繫辭〉說，「變動不居，周流六虛，上下無常，剛柔相濟，不可為典要，為變所適。」