A man’s physical hunger does not prove that that man will get any bread; he may die of starvation on a raft in the Atlantic. But surely a man’s hunger does prove that he comes of a race which repairs its body by eating, and inhabits a world where eatable substances exist. In the same way, though I do not believe (I wish I did) that my desire for Paradise proves that I shall enjoy it, I think it a pretty good indication that such a thing exists and that some men will. A man may love a women and not win her; but it would be very odd if the phenomenon called “falling in love” occurred in a sexless world.
–C. S. Lewis,
The Weight of Glory