Perpetual Growth and Change
The term stands for perpetual change. According to The Book of Changes, while shengsheng (生生) here means continued growth and perpetual change, it can be understood at two levels. First, in regard to the existence of all things, it is the interaction of yin and yang that drives the process of the endless cycle of birth, rebirth, and change of heaven, earth, and all things. This process is a fundamental attribute of the universe, and the source of ethical behavior. Second, as a term in divination, it refers to the alternation of yin and yang hexagram lines and the fact that all elements in the symbol system of The Book of Changes are in a perpetual state of change.
One generation gives life to another generation in perpetual change. (The Book of Changes)
Continued growth and perpetual change is essence of the way of heaven. Heaven follows this principle, and kindness is guided by this principle. (Writings of the Cheng Brothers)