Julie, a children’s doctor at a large hospital, liked to put the children at ease before she examined them. She would plug the stethoscope into their little ears and let them listen to their own heartbeat. This usually dispelled their fear of the doctor and made them more comfortable. Their eyes would light up in amazement, hearing their own heart pumping the blood round their body. One day she tried this with four year old James. Gently she tucked the stethoscope into his ears and placed the disk over his heart. "Listen," she said, "What do you think that is?" He looked puzzled at the strange tap - tap - tapping coming from his chest. Then his face broke out in a big grin and he replied, "Is that Jesus knocking?"