Nothing endures but change. There is nothing permanent except change. All is flux, nothing stays still.

If you do not hope, you will not win that which is not hoped for, since it is unattainable and inaccessible.

War is the father and king of all: some he has made gods, and some men; some slaves and some free.

All things flow, nothing abides.

Not I but the world says it: All is one.

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 one can step twice into the same river, nor touch mortal substance twice in the same condition. By the speed of its change, it scatters and gathers again.