By STEPHEN MARCHE
Christians famously have the problem of pain: how can a benevolent and omnipotent god permit evil to exist? But atheists like myself have our own paradox to contend with: the problem of joy. Why do randomly good things happen? In Graham Greene’s “The Power and the Glory,” a priest gives the explicit defense of their reality to his Red Shirt captor: “Can’t you see the doctors round the dead man? He isn’t breathing anymore, his pulse has stopped, his heart’s not beating: he’s dead. Then somebody gives him back his life, and they all — what’s the expression? — reserve their opinion. They won’t say it’s a miracle, because that’s a word they don’t like.” C. S. Lewis described his conversion to Christianity as a process of being “surprised by joy.”