What is Prayer for?

“Prayer is for the accomplishment of a wartime mission. It is as though the field commander (Jesus) called in the troops, gave them a crucial mission (go and bear fruit), handed each of them a personal transmitter coded to the frequency of the General’s headquarters, and said, ‘Comrades, the General has a mission for you…And to that end he has authorized me to give each of you personal access to him through these transmitters. If you stay true to his mission and seek his victory first, he will always be as close as your transmitter, to give tactical advice and to send air cover when you need it.”

~ John Piper, Let the Nations Be Glad, p.49