British writer Evelyn Waugh wielded his words in a way that accentuated his character flaws. Eventually the novelist converted to Christianity, yet he still struggled. One day a woman asked him, “Mr. Waugh, how can you behave as you do and still call yourself a Christian?” He replied, “Madam, I may be as bad as you say. But believe me, were it not for my religion, I would scarcely be a human being.”

Waugh was waging the internal battle the apostle Paul describes: “I want to do what is right, but I can’t” (Rom. 7:19 nlt). He also says, “The trouble…