The interest I have to believe a thing is no proof that such a thing exists.

Anyone who seeks to destroy the passions instead of controlling them is trying to play the angel.

We should be considerate to the living; to the dead we owe only the truth.

Superstition is to religion what astrology is to astronomy the mad daughter of a wise mother. These daughters have too long dominated the earth.

A little evil is often necessary for obtaining a great good.

I would rather obey a fine lion, much stronger than myself, than two hundred rats of my own species.

If this is the best of possible worlds, what then are the others?