'God is or he is not.' But to which side shall we incline?…Let us weigh the gain and the loss in wagering that God is. Let us estimate the two chances. If you gain, you gain all; if you lose, you lose nothing. Wager then without hesitation that he is.
Known as Pascal's wager
Pensées (1670, ed. L. Brunschvicg, 1909) sect. 3, no. 233
