..[W]e remain conscious of a desire which no natural happiness will satisfy. But is there any reason to suppose that reality offers any satisfaction to it? ‘Nor does the being hungry prove that we have bread.’ But I think it may be urged that this misses the point. A man’s physical hunger does not prove 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 woman and not win her; but it would be very odd if the phenomenon called ‘falling in love’ occurred in a sexless world.
from The Weight of Glory