Martyn Lloyd-Jones once wrote: “Prayer is beyond any question the highest activity of the human soul. Man is at his greatest and highest when upon his knees he comes face to face with God” (Studies in the Sermon on the Mount, 2 vols. [Grand Rapids: Eerdmans, 1979], 2:45). Commentator J. Oswald Sanders adds this lofty view of prayer: No spiritual exercise is such a blending of complexity and simplicity. It is the simplest form of speech that infant lips can try, yet the sublimest strains