Life is short, but art lives forever.

It is not easy to distinguish between true and false affection, unless there occur one of those crises in which, as gold is tried by fire, so a faithful friendship may be tested by danger.

Your enemies can kill you, but only your friends can hurt you.

To study philosophy is nothing but to prepare one’s self to die.

Death approaches, which is always impending like the stone over Tantalus: then comes superstition with which he who is imbued can never have peace of mind.

If a man cannot feel the power of God when he looks upon the stars, then I doubt whether he is capable of any feeling at all.

If we are not ashamed to think it, we should not be ashamed to say it.