fǎn zhě dào zhī dòng 反者道之动
The Only Motion Is Returning.
The motion of Dao is to transform into the opposite or return to the original state. This concept was proposed by Laozi. Laozi believed that Dao is the fundamental rule of motion and change of things. The essence of this rule is “return,” which has two different implications. One indicates the contrary and opposite, namely, a thing in motion may transform into its opposite. The other suggests returning, meaning that a thing eventually returns to its initial state. This concept embodies the profound understanding of Laozi and Daoist scholars about the rule governing the motion of things.
The motion of Dao is transforming into the opposite or returning to the original state; and Dao is soft and humble while it is functioning. (Laozi)