It would not be better if things happened to men just as they wish.

When men dream, each has his own world. When they are awake, they have a common world.

You cannot step twice into the same river.

Presumption must be quenched even more than a fire.

All things are in flux; the flux is subject to a unifying measure or rational principle. This principle (logos, the hidden harmony behind all change) bound opposites together in a unified tension, which is like that of a lyre, where a stable harmonious sound emerges from the tension of the opposing forces that arise from the bow bound together by the string.

No same man could walk through the same river twice, as the man and the river have since changed.

War is the mother of everything.