Prayer is indeed a mystery, but it is stressed over and over again in the New Testament as a vital prerequisite for the release and experience of God’s power. It is true that it is God who delivers, and that God stands in no need of human prayers before He can act on behalf of His afflicted servants. Yet there is the manward as well as the Godward aspect of such deliverance, and the manward side is summed up in the duty of Christians to intercede... In prayer, human impotence casts itself at the feet of divine omnipotence. Thus the duty of prayer is not a modification of God’s power, but a glorification of it.