If it were not for injustice, men would not know justice.

There is but one world common for those who are awake, but when men are asleep, each turns away into a world of his own.

There is nothing permanent except change. Nothing is permanent except change. The only constant is change. Change is the only constant. Change alone is unchanging.

Many who have learned from Hesiod the countless names of gods and monsters never understand that night and day are one

Big results require big ambitions.

It is harder to fight pleasure than to fight emotion.

All entities move and nothing remains still.