A little boy went to a doctor for a throat checkup and noticed a religious painting on the doctor's wall.

"What's that for?" the boy asked.

"That reminds me that someday I'm going to heaven," the doctor replied. "Wouldn't you like to go to heaven?"

"Sure," the boy answered. "Well, now, what do you think we must do to get there?" the doctor asked.

"We must die," the boy responded. "That's right," the doctor smiled, "but what must we do before that?"

The boy pondered and then said, "We must get sick and send for you."