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 that reach the Majesty on high. It is as appropriate to the aged philosopher as to the little child. It is the ejaculation of a moment and the attitude of a lifetime. It is the expression of the rest of faith and of the fight of faith. It is an agony and an ecstasy. It is submissive and yet importunate. In the one moment it lays hold of God and binds the devil. It can be focused on a single objective and it can roam the world. It can be abject confession and rapt adoration. It invests puny man with a sort of omnipotence
(Effective Prayer [Chicago: Moody, 1969], 7).
MacArthur, John: Alone With God. Wheaton, Ill. : Victor Books, 1995