I was reading John Piper's Hunger for God: Desiring God through Fasting and Prayer today. He made this convicting statement about our lack of desire for God and His glory because of our desires that are too fixated on the world's table. He recommends the discipline of fasting with the purpose of weaning our desires from the molding bread of the world unto the true Bread of Life -- Jesus!
If you don’t feel strong desires for the manifestation of theglory of God, it is not because you have drunk deeply and aresatisfied. It is because you have nibbled so long at the table ofthe world. Your soul is stuffed with small things, and there isno room for the great. God did not create you for this. Thereis an appetite for God. And it can be awakened. I invite you toturn from the dulling effects of food and the dangers of idolatry,and to say with some simple fast: “This much, O God, Iwant you.” ("Introduction - page 23)