Speak of the Devil
Talking about God, most of you probably know Voltaire's quip about the necessity of inventing Him, if he didn't exist. The director's cut has some interesting context:
"I want my lawyer, my tailor, my servants, even my wife to believe in God, because it means that I shall be cheated and robbed and cuckolded less often. ... If God did not exist, it would be necessary to invent him."