Appreciation is a wonderful thing: It makes what is excellent in others belong to us as well.

History is the study of the world's crime

War is the greatest of all crimes; and yet there is no aggressor who does not color his crime with the pretext of justice.

Constant happiness is the philosopher's stone of the soul.

The policy of man consists, at first, in endeavoring to arrive at a state equal to that of animals, whom nature has furnished with food, clothing, and shelter.

The greatest consolation in life is to say what one thinks.

All men are by nature free; you have therefore an undoubted liberty to depart whenever you please, but will have many and great difficulties to encounter in passing the frontiers.