John 15:7

John 15:7. If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you.

Power in prayer is dependent upon full enjoyment of union and communion with Christ. It is not every man who can ask of God what he wills, and get it; but it is such a man, and such a man only, as shall be found abiding in Christ, and having Christ’s words abiding in him. If we do not take notice of what Christ says, can we expect that he will take notice of what we say? If we do not obey him when he asks this and that of us, how can we reckon that he will give us this and that when we ask it of him? No, this is the condition of power in prayer, "If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you."