Well I am certainly wiser than this man. It is only too likely that neither of us has any knowledge to boast of; but he thinks that he knows something which he does not know, whereas I am quite conscious of my ignorance. At any rate it seems that I am wiser than he is to this small extent, that I do not think that I know what I do not know.

The really important thing is not to live, but to live well. And to live well meant, along with more enjoyable things in life, to live according to your principles.

All men's souls are immortal, but the souls of the righteous are immortal and divine.

Is there anyone to whom you entrust a greater number of serious matters than your wife? And is there anyone with whom you have fewer conversations?

Wisdom is knowing what you don't know.

Virtue does not come from wealth, but wealth, and every other good thing which men have comes from virtue.

To be uncertain is to be uncomfortable, but to be certain is to be ridiculous.