. . . Then anyone who leaves behind him a written manual, and likewise anyone who receives it, in the belief that such writing will be clear and certain, must be exceedingly simple-minded. . . .

To fear death, my friends, is only to think ourselves wise without really being wise, for it is to think that we know what we do not know.

Take a look around, then, and see that none of the uninitiated are listening. Now by the uninitiated I mean the people who believe in nothing but what they can grasp in their hands, and who will not allow that action or generation or anything invisible can have real existence.

The soul should concentrate itself by itself.

According to Greek mythology, humans were originally created with four arms, four legs and a head with two faces. Fearing their power, Zeus split them into two separate parts, condemning them to spend their lives in search of their other halves.

Let him take heart who does advance, even in the smallest degree.

Better a good enemy than a bad friend.