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?

I don't care what people say about me. I do care about my mistakes.

He who is not contented with what he has, would not be contented with what he would like to have.

Nothing very new. By taking good care of yourselves you are of service to me and my family as well as yourselves, no matter what you do, even if you don't think so at present. But if you neglect yourselves and are unwilling to live, as though following tracks, in accordance with what we now say and have said in the past too, then no matter how much or how seriously you agree with me at present you will accomplish next to nothing.

There is a doctrine whispered in secret that a man is a prisoner who has no right to open the door and run away; this is a great mystery which I do not quite understand.

Improve yourself by other men's writings thus attaining effortlessly what they acquired through great difficulty.

The man who is truly wise knows that he knows very little.