We rejoice in the joys of our friends as much as we do our own, and we are equally grieved at their sorrows. Wherefore the wise people will feel toward their friends as they do toward themselves, and whatever labor they would encounter with a view to their own pleasure, they will encounter also for the sake of their friends.

Man is his own worst enemy.

If I err in belief that the souls of men are immortal, I gladly err, nor do I wish this error which gives me pleasure to be wrested from me while I live.

For surely to be wise is the most desirable thing in all the world.

Fear is not a lasting teacher of duty.

Any man is liable to err, only a fool persists in error.

He who has once deviated from the truth, usually commits perjury with as little scruple as he would tell a lie.