Waxing and waning are two ways in which things change. These two ways are opposites, but they also alternate with each other. When something has grown to a certain point, it will begin to decline, and having declined to a certain degree it will begin to grow again. All things between heaven and earth are in a process of waxing and waning in compliance with their internal laws. People need to grasp this law and act accordingly as things wax and wane.
Things grow or wither as time goes by, or advance or retrogress as circumstances change. This term comes from The Book of Changes. Ancient Chinese believed that the world evolved with time, nothing remained unchanged and that people should act in keeping with the circumstances. They stressed that people should observe the way of heaven and “go with the times.”
The term refers to the fundamental state of the existence of things. Bian (变) and hua (化) may be used as one word or separately. Specifically, bian means manifest change, while hua indicates subtle and gradual change. Ancient Chinese thinkers generally held that all things under heaven and on earth, including humans and society, are all in a state of change. Only through constant change can they permanently exist and develop. Change is caused by constant clash and integration between the conflicting properties with which people and things are endowed. Some scholars believed that change follows a constant law and can thus be understood and grasped, while others maintained that change is unpredictable and therefore difficult to grasp. Buddhism, on the other hand, holds that changes of things are only superficial, and that all things are still and motionless.
The term stands for perpetual change. According to The Book of Changes, shengsheng (生生) 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 lines and the fact that all elements in the symbol system of The Book of Changes are in a perpetual state of change.
This term means one should not only have a good command of the basic rules that govern things, but also know how to deal with exceptional situations or problems in a flexible manner. It suggests that one should not just adhere to principles, but also act according to circumstances. Chang (常permanence) and bian (变change) are two opposing concepts in ancient Chinese philosophy. The nature of things that decides what they are, and their basic rules or general principles that are relatively stable are called chang (permanence); but when it comes to specific situations or ways to deal with them, they are different and change in different circumstances, thus they are called bian (change). Relative to change, permanence is what endures within change. Permanence is fundamental while change is a deviation. Therefore, one needs not only to have a good command of the basic rules and general principles of things, but also know how to apply these rules and principles in a flexible manner according to objective circumstances. The mastery of both permanence and change reflects ancient Chinese people’s perception of both generality and particularity as well as principles and flexibility. It also shows their methodology in the application of both.