Through your rags I see your vanity.

The uninitiated are those who believe in nothing except what they can grasp in their hands, and who deny the existence of all that is invisible.

The beginning of wisdom is a definition of terms.

Who knows if to live is to be dead, and to be dead, to live? And we really, it may be, are dead; in fact I once heard sages say that we are now dead, and the body is our tomb.

Knowledge is our ultimate good.

Whatever authority I may have rests solely on knowing how little I know.

I must first know myself, as the Delphian inscription says; to be curious about that which is not my concern, while I am still in ignorance of my own self, would be ridiculous. And therefore I bid farewell to all this; the common opinion is enough for me. For, as I was saying, I want to know not about this, but about myself: am I a monster more complicated and swollen with passion than the serpent Typho, or a creature of a gentler and simpler sort, to whom Nature has given a diviner and lowlier destiny?