The life given us, by nature is short; but the memory of a well-spent life is eternal.

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

It is our own evil thoughts which madden us.

As in the case of wines that improve with age, the oldest friendships ought to be the most delightful.

There is in superstition a senseless fear of God; religion consists in the pious worship of Him.

Law is the highest reason implanted in Nature, which commands what ought to be done and forbids the opposite.

What is morally wrong can never be advantageous, even when it enables you to make some gain that you believe to be to your advantage. The mere act of believing that some wrongful course of action constitutes an advantage is pernicious.