The story has been told of a man who was crossing a desert in the days of the pioneers. He ran into trouble and was dying of thirst when he spotted a pump near an abandoned shack. He had no water to prime the pump, but he noticed a jug of water near the pump with a note attached. It read: “There is just enough water in this jug to prime the pump, but not if you drink some first. This well has never gone dry, even in the worst of times. Pour the water in the top of the pump and pump the handle quickly. After you have had a drink, refill this jug for the next man who comes along.”

What would the man dying of thirst do? To follow the instructions and prime the pump without first taking a drink would be an exercise of the kind of belief the Bible speaks of. Biblical belief requires that one stake his life on the truth of the promise. If the man follows the instructions, he takes the chance of pouring out all the water and getting none to drink if the pump fails. So he must trust that the message is right. He must act in belief, without first receiving, and must trust in the truth of the promise.