"In God We Trust." It is the choicest compliment that has ever been paid us, and the most gratifying to our feelings. It is simple, direct, gracefully phrased: it always sounds well — In God We Trust. I don't believe it would sound any better if it were true. And in a measure it is true — half the nation trusts in Him. That half has decided it.
p. 394. - Mark Twain's Notebook (1935)