Nothing is more unworthy of a wise man, or ought to trouble him more, than to have allowed more time for trifling, and useless things, than they deserve.

All soul is immortal. For that which is always in movement is immortal; that which moves something else, and is moved by something else, in ceasing from movement ceases from living. So only that which moves itself, because it does not abandon itself, never stops moving. But it is also source and first principle of movement for the other things which move.

Don't ask a poet to explain himself. He cannot.

You ought not to heal the body without the soul, for this is the great error of our day in treating the human body.

And among the other honours and rewards our young men can win for distinguished service in war and in other activities, will be more frequent opportunities to sleep with a woman; this will give us a pretext for ensuring that most of our children are born of that parent.

No one knows whether death may not be the greatest good that can happen to man.

Ideas are the source of all things