A new principle is an inexhaustible source of new views.

Hope animates the wise, and lures the presumptuous and indolent who repose inconsiderately on her promises.

The usual pretext of those who make others unhappy is that they do it for their own good.

There does not exist a man sufficiently intelligent never to be tiresome.

Constancy is the chimera of love.

The maxim that men are not to be praised before their death was invented by envy and too lightly adopted by philosophers.

To achieve great things we must live as though we were never going to die.