Much learning does not teach sense.

Everything is in flux.

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.

No man ever steps in the same river twice, for it's not the same river and he's not the same man.

All is flux; nothing stays still.

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

All men have the capacity of knowing themselves and acting with moderation.