《黄帝四经·经法·论约》
有生长就有凋谢，有繁荣就有枯萎，四季交相行事，终而复始，这就是天道，人类社会的运行法则即是这些天道的取法和再现。
功不及天，退而无名；功合于天，名乃大成。
There is growth and decay, prosperity and withering, and the four seasons follow each other and start again. This is the way of heaven, and the laws of operation of human society are the law and reproduction of these ways of heaven.