"I could say, "God can make my hands clean if He wants to," or I could wash them myself. Chances are, God won't make my hands clean. That's a job He leaves up to me. His omnipotence is not impaired by His having ordained my participation, whether it be in the washing of hands with soap or the helping of a friend with prayer."
"One way of laying down our lives is by praying for somebody. In prayer I am saying, in effect, "my life for yours." My time, my energy, my thought, my concern, my concentration, my faith- here they are, for you. So it is that I participate in the work of Christ."