If a dog jumps into your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.

Knowledge shrinks as wisdom grows.

Wisdom alone is true ambition's aim, wisdom is the source of virtue and of fame; obtained with labour, for mankind employed, and then, when most you share it, best enjoyed.

Life is an offensive, directed against the repetitious mechanism of the Universe.

Religion is the last refuge of human savagery.

Without adventure civilization is in full decay.