“He repeated the story he liked to tell us. The one with the small boy who was trying to lift a rock in his garden, and the boy’s dad was watching him heave and sweat and struggle, but get nowhere. Eventually the dad asks, ‘Why don’t you use all of your strength?’ And the boy says, ‘I am, Daddy. I am using all of my strength.’ And his dad says, ‘No you’re not. You haven’t asked me for help.”