God has given us prayer as a wartime walkie-talkie so that we can call headquarters for everything we need as the kingdom of Christ advances in the world. Prayer gives us the significance of front-line forces, and gives God the glory of a limitless Provider. The one who gives the power gets the glory. Thus prayer safeguards the supremacy of God in missions while linking us with endless grace for every need.
John PiperCHRISTIAN LIVING MOVES from what God has freely done for us in Christ to what we should freely do for others.
John PiperThere is no other way the world is going to see the supreme glory of Christ today, except that we break free from the Disneyland of America and begin to live lifestyles of missionary sacrifice that looks to the world like our treasure is in heaven and not on the earth.
John Piper