there is unseen flux and movement. Cosmic history runs in repetitious cycles, each beginning and ending in fire (here is one source of the Stoic and Christian doctrine of last judgment and hell). “Through strife,” says Heraclitus, “all things arise and pass away... War is the father and king of all: some he has made gods, and some men; some slaves, and some free.” Where there is no strife there is decay: “the mixture which is not shaken decomposes.” In this flux of change and struggle and selection, only one thing is constant, and that is law.
