The only thing I know is that I know nothing

To Believe without evidence and demonstration is an act of ignorance and folly

The Delphic Oracle said I was the wisest of all the Greeks. It is because that I alone, of all the Greeks, know that I know nothing.

There is no illness of the body except for the mind

I pray Thee, O God, that I may be beautiful within.

When desire, having rejected reason and overpowered judgment which leads to right, is set in the direction of the pleasure which beauty can inspire . . .

Since all of us desire to be happy, and since we evidently become so on account of our use—that is our good use—of other things, and since knowledge is what provides this goodness of use and also good fortune, every man must, as seems plausible, prepare himself by every means for this: to be as wise as possible. Right?