In doing these works, however, we must not think that a man is justified before God by them: for that erroneous opinion faith, which alone is righteousness before God, cannot endure; but we must think that these works reduce the body to subjection and purity it of its evil lusts, and our whole purpose is to be directed only toward the driving out of lusts. For since by faith the soul is cleansed and made a lover of God, it desires that all things, and especially its own body, shall be as pure as itself, so that all things may join with it in loving and praising God. Hence a man cannot be idle, because the need of his body drives him and he is compelled to do many good works to reduce it to subjection. Nevertheless the works themselves do not justify him before God, but he does the works out of spontaneous love in obedience to God, and considers nothing except the approval of God, Whom he would in all things most scrupulously obey. In this way every one will easily be able to learn for himself the limit and discretion, as they say, of his bodily castigations: for he will fast, watch and labor as much as he finds sufficient to repress the lasciviousness and lust of his body. But they who presume to be justified by works do not regard the mortifying of the lusts, but only the works themselves, and think that if only they have done as many and as great works as are possible, they have done well, and have become righteousness; at times they even addle their brains and destroy, or at least render useless, their natural strength with their works. This is the height of folly, and utter ignorance of Christian life and faith, that a man should seek to be justified and saved by works and without faith. [Sidenote: An Analogy] In order that what we have said may be more easily understood, we will explain it by analogies. We should think of the works of a Christian man who is justified and saved by faith because of the pure and free mercy of God, just as we would think of the works which Adam and Eve did in Paradise, and all their children would have done if they had not sinned. We read in Genesis ii, "God put the man whom He had formed into the garden of Eden to dress it and to keep it." [Gen. 2:15] Now Adam was created by God righteous and upright and without sin, so that he had no need of being justified and made upright through his dressing and keeping the garden, but, that he might not be idle, the Lord gave him a work to do--to cultivate and to protect the garden. These would truly have been the freest of works, done only to please God and not to obtain righteousness, which Adam already had in full measure, and which would have been the birthright of us all.