Whatever there may be in the contention as to whether or not healing the sinful and sick demonstrates the truth of Christian Science, this much is certain: the sinful and sick are healed by the application of this faith, and this fact is the only evidence to the practitioner that he really understands the Science, and is the only proof to him that his argument that God, Spirit, is the only real Life, substance, and intelligence, is true; while the claim that lesser powers can produce and maintain sin and sickness, is false.