We are rarely proud when we are alone.

Pleasantry is never good on serious points, because it always regards subjects in that point of view in which it is not the purpose to consider them.

Mortals are equal; their mask differs.

Monsieur l'abbé, I detest what you write, but I would give my life to make it possible for you to continue to write.

I have never made but one prayer to God, a very short one: 'O Lord make my enemies ridiculous.' And God granted it.

Our labour preserves us from three great evils -- weariness, vice, and want.

I hold firmly to my original views. After all I am a philosopher.