In a mother’s womb were two babies. One asked the other: “Do you believe in life after delivery?”The other replied, “Why, of course. There has to be something after delivery. Maybe we are here to prepare ourselves for what we will be later.”

“Nonsense,” said the first. “There is no life after delivery. What kind of life would that be?”

The second said, “I don’t know, but there will be more light than here. Maybe we will walk with our legs and eat from our mouths. Maybe we will have...