Christian fasting is a test to see what desires control us. Fasting reveals the measure of food’s mastery over us – or television or computers or whatever we submit to again and again to conceal the weakness of our hunger for God. A real lived-out human act of preference for God over His gifts is the actual lived-out glorification of God’s excellence for which He created the world. Fasting is not the only way, or the main way, that we glorify God in preferring Him above His gifts. But it is one way.