The power of prayer is not the result of the person praying. Rather, the power resides in the God who is being prayed to. 1 John 5:14-15 tells us this; no matter what you are praying for, the passion behind the prayer, or the purpose of the prayer - God answers prayers that are in agreement with His will. His answers are not always yes, but are always in your best interest. When your desires line up with His Will and when you come into agreement with other believers that pray passionately and purposefully, according to God's Will, God responds powerfully!