For your heart is your life, and your life can only be altered by that which is the real working of your heart. And if your prayer is only a form of words, made by the skill of other people, such a prayer can no more change you into a good man, than an actor upon the stage, who speaks kingly language, is thereby made to be a king: whereas one thought, or word, or look, towards God, proceeding from your own heart, can never be without its proper fruit, or fail of doing a real good to your soul. Again, another great and infallible benefit of this kind of prayer is this; it is the only way to be delivered from the deceitfulness of your own hearts. [Continued tomorrow]

… William Law (1686-1761), The Spirit of Prayer [1749]