When a believing person prays, great things happen. Jas 5:16
Prayer is the recognition that if God had not engaged himself in our problems, we would still be lost in the blackness. It is by his mercy that we have been lifted up. Prayer is that whole process that reminds us of who God is and who we are.
I believe there's great power in prayer. I believe God heals the wounded, and that he can raise the dead. But I don't believe we tell God what to do and when to do it.
God knows that we, with our limited vision, don't even know that for which we should pray. When we entrust our requests to him, we trust him to honour our prayers with holy judgment.
Walking with the Savior (by: Max Lucado)