When we inject the proviso ‘if it be thy will,’ it is always an acknowledgement that we are not praying the prayer of faith, but that we have a doubt in our own heart… When you pray for the sick and insert the proviso ‘if it be thy will,’ you are placing all responsibility of that healing on God and assuming absolutely none yourself.
Bodily Healing and the Atonement, Faith Library 1930/1982, 83