"'I would soon have renounced pleasure,' say they, 'had I faith.' For my part I tell you, 'You would soon have faith, if you renounced pleasure.' Now, it is for you to begin. If I could, I would give you faith. I cannot do so, nor therefore test the truth of what you say. But you can well renounce pleasure and test whether what I say is true."
Pascal, Pensees, #240.