"Work keeps at bay three great evils: boredom, vice, and need."

"The greatest comfort of man in this life is the knowledge that he has done his duty."

"I disapprove of what you say, but I will defend to the death your right to say it."

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

"The more I read, the more I acquire, the more certain I am that I know nothing."