The settled happiness and security which we all desire, God withholds from us by the very nature of the world: but joy, pleasure, and merriment, He has scattered broadcast. We are never safe, but we have plenty of fun, and some ecstasy. It is not hard to see why. The security we crave would teach us to rest our hearts in this world and oppose an obstacle to our return to God: a few moments of happy love, a landscape, a symphony, a merry meeting with our friends, a bathe or a football match, have no such tendency. Our Father refreshes us on the journey with some pleasant inns, but will not encourage us to mistake them for home.
—C.S. Lewis, The Problem of Pain, chapter 7
All loves, all joys, all pleasures are given as momentary gifts to lead us to long for greater love, fuller joys, unending pleasures, all of which can only be satisfied in God himself. God wants us to long for more than we experience. He wants us to long for Him. The greatest being in the universe can only give the greatest gift. He must give Himself.