"You don't know how many people have been strengthened because you asked God to encourage them; how many people have been healed because you prayed for their bodies; how many spiritual runaways have come home because you prayed for their souls. None of us may ever know the true effects of our prayers this side of death. But we do know this: History belongs to the intercessors."
-John Ortberg, "The Life You've Always Wanted"