It is not only prayer that gives God glory but work. Smiting on an anvil, sawing a beam, whitewashing a wall, driving horses, sweeping, scouring, everything gives God some glory if being in his grace you do it as your duty. To go to communion worthily gives God great glory, but to take food in thankfulness and temperance gives him glory too. To lift up the hands in prayer gives God glory, but a man with a dungfork in his hand, a woman with a sloppail, give him glory too. He is so great that all things give him glory if you mean they should. So then, my brethren, live.

Gerard Manley Hopkins, "The Principle or Foundation"

A prayer from John Piper's Seeing and Savoring Jesus Christ:

O Father of glory, this is the cry of our hearts--to be changed from one degree of glory to another, until, in the resurrection, at the last trumpet, we are completely conformed to the image of your Son, Jesus Christ, our Lord. Until then, we long to grow in grace and in the knowledge of our Lord, especially the knowledge of his glory. We want to see it as clearly as we see the sun, and to savor it as deeply as our most desired pleasure. O merciful God, incline our hearts to your Word and the wonders of your glory. Wean us from our obsession with trivial things. Open the eyes of our hearts to see each day what the created universe is telling about your glory. Enlighten our minds to see the glory of your Son in the Gospel. We believe that you are the All-glorious One, and that there is none like you. Help our unbelief. Forgive the wandering of our affections and the undue attention we give to lesser things. Have mercy on us for Christ’s sake, and fulfill in us your great design to display the glory of your grace. In Jesus’ name we pray, amen.

The weakness of our hunger for God is not because he is unsavory, but because we keep ourselves stuffed with "other things." Perhaps, then, the denial of our stomach's appetite for food might express, or even increase, our soul's appetite for God.

 What is at stake here is not just the good of our souls, but also the glory of God. God is most glorified in us when we are most satisfied in him. The fight of faith is a fight to feast on all that God is for us in Christ. What we hunger for most, we worship.

 . . .

 When God is the supreme hunger of our hearts, he will be supreme in everything.

John Piper, A Hunger for God