Has a doctor or nurse ever allowed you to use his/her stethoscope and listen to your own heart? It’s a rather strange experience to hear the steady rhythms to that organ which started and function ever before you were born and will continue beating until you die. I hear a story of a certain nurse who often let her young patients listen to their own hearts. One day as she carefully positioned the stethoscope for a 4-year-old boy, she said to him, “Listen. What do you suppose that is?” He tightened his eyebrows in deep thought and with a bright smile asked, “Is that Jesus knocking?”