Voltaire

"Work saves us from three great evils: boredom, vice, and need."

"Optimism is the madness of insisting that all is well when we are miserable."

"We must cultivate our own garden."

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

"Perfect is the enemy of good."

"Judge a man by his questions rather than by his answers."

"The secret of being a bore is to tell everything."