Pastor Tim Keller used the following example to show how to find ultimate joy and satisfaction in Christ:

Do you remember when your mother used to say, "Don't eat candy before meals?" Why did she say that? Because she knew it would ruin your next meal. The trouble with eating candy is that it gives you a sugar buzz, and then you don't feel hungry. Candy masks the fact that your body needs proteins and vitamins. The sugar buzz from candy masks your hunger for the real nutrients that you don't have.

Things like sex, power, money, and success—as well as favorable circumstances—act like spiritual sugar. Christians who have these spiritual candies may say, "Sure, I believe in God and I know I'm going to heaven," but they're actually basing their day-to-day joy on favorable circumstances. When the circumstances change, it drives us to God, because when the sugar disappears, when the candy gets taken away, we're forced to pursue the feast that our souls really crave. We'll hunger for the spiritual nutrients we really need.