Superstition sets the whole world in flames, but philosophy douses them.

Every one should be his own physician. We ought to assist, and not to force nature. Eat with moderation...Nothing is good for the body but what we can digest. What medicine can procure digestion? Exercise. What will recruit strength? Sleep.

Nothing is so common as to imitate one's enemies, and to use their weapons.

Opinion is called the queen of the world; it is so, for when reason opposes it, it is condemned to death. It must rise twenty times from its ashes to gradually drive away the usurper.

Heaven made virtue; man, the appearance.

Indeed, history is nothing more than a tableau of crimes and misfortunes.

All the persecutors declare against each other mortal war, while the philosopher, oppressed by them all, contents himself with pitying them.