The best is the enemy of the good.

No opinion is worth burning your neighbor for.

What then do you call your soul? What idea have you of it? You cannot of yourselves, without revelation, admit the existence within you of anything but a power unknown to you of feeling and thinking.

If you wish to obtain a great name or to found an establishment, be completely mad; but be sure that your madness corresponds with the turn and temper of your age.

I am a little deaf, a little blind, a little important and on top of this are two or three abominable infirmities, but nothing destroys my hope.

What is madness? To have erroneous perceptions and to reason correctly from them.

Work is often the father of pleasure.