Happiness is a virtue, not its reward.

I do not know how to teach philosophy without becoming a disturber of established religion.

He, who knows how to distinguish between true and false, must have an adequate idea of true and false.

Things which are accidentally the causes either of hope or fear are called good or evil omens.

Nature offers nothing that can be called this man's rather than another's; but under nature everything belongs to all.

Peace is not the absence of war, but a virtue based on strength of character.

If you want the present to be different from the past, study the past.