In his teens, a young man wrote, ""I believe in no religion. There is absolutely no proof for any of them."" After serving in the trenches of WW1, the same young man said, ""I never sank so low as to pray."" To a religious friend, he wrote impatiently, ""You can't start with God. I don't accept God!"" This young man was C. S. Lewis, the ""foul-mouthed atheist"" who would become one of the most eloquent Christian writers of the twentieth century. David...