We cannot know what prayer is for until we know that life is war. Life is war. That’s not all it is. But it is always that. Our weakness in prayer is owing largely to our neglect of this truth. Prayer is primarily a wartime walkie-talkie for the mission of the church as it advances against the powers of darkness and unbelief. It is not surprising that prayer malfunctions when we try to make it a domestic intercom to call upstairs for more comforts in the den. God has given 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 frontline 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 Piper in Let the Nations Be Glad
Prayer is primarily a wartime walkie-talkie for the mission of the church as it advances against the powers of darkness and unbelief.