There is exchange of all things for fire and of fire for all things, as there is of wares for gold and of gold for wares.

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

Most people do not take heed of the things they encounter, nor do they grasp them even when they have learned about them, although they suppose they do.

It is by disease that health is pleasant; by evil that good is pleasant; by hunger, satiety; by weariness, rest.

The nature of things is in the habit of concealing itself.

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.

Those who are awake all live in the same world. Those who are asleep live in their own worlds.