Republics come to an end by luxurious habits; monarchies by poverty.
Friendship is an arrangement by which we undertake to exchange small favors for big ones.
You have to study a great deal to know a little.
There should be weeping at a man's birth, not at his death.
If I knew something that would serve my country but would harm mankind, I would never reveal it; for I am a citizen of humanity first and by necessity, and a citizen of France second, and only by accident
It is always the adventurers who do great things, not the sovereigns of great empires.