21. I find then a law, that, when I would do good, evil is present with me.
21. Reperio igitur Legem volenti mihi facere bonum quod mihi malum insideat.
22. For I delight in the law of God after the inward man:
22. Consentio enim Legi Dei secundum interiorem hominem.
23. But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
23. Video autem alterum Legem in membris meis, repugnantem legi mentis meæ, et captivum me reddentem legi peccati, quæ est in membris meis.
21. I find then, etc. Here Paul supposes a fourfold law. The first is the law of God, which alone is properly so called, which is the rule of righteousness, by which our life is rightly formed. To this he joins the law of the mind, and by this he means the prompt readiness of the faithful mind to render obedience to the divine law, it being a certain conformity on our part with the law of God. On the other hand, he sets in opposition to this the law of unrighteousness; and according to a certain kind of similarity, he gives this name to that dominion which iniquity exercises over a man not yet regenerated, as well as over the flesh of a regenerated man; for the laws even of tyrants, however iniquitous they may be, are called laws, though not properly. To correspond with this law of sin he makes the law of the members, that is, the lust which is in the members, on account of the concord it has with iniquity.
As to the first clause, many interpreters take the word law in its proper sense, and consider kata or dia to be understood; and so Erasmus renders it, |by the law;| as though Paul had said, that he, by the law of God as his teacher and guide, had found out that his sin was innate. But without supplying anything, the sentence would run better thus, |While the faithful strive after what is good, they find in themselves a certain law which exercises a tyrannical power; for a vicious propensity, adverse to and resisting the law of God, is implanted in their very marrow and bones.|
22. For I consent to the law of God, etc. Here then you see what sort of division there is in pious souls, from which arises that contest between the spirit and the flesh, which Augustine in some place calls the Christian struggle (luctam Christianam.) The law calls man to the rule of righteousness; iniquity, which is, as it were, the tyrannical law of Satan, instigates him to wickedness: the Spirit leads him to render obedience to the divine law; the flesh draws him back to what is of an opposite character. Man, thus impelled by contrary desires, is now in a manner a twofold being; but as the Spirit ought to possess the sovereignty, he deems and judges himself to be especially on that side. Paul says, that he was bound a captive by his flesh for this reason, because as he was still tempted and incited by evil lusts; he deemed this a coercion with respect to the spiritual desire, which was wholly opposed to them.
But we ought to notice carefully the meaning of the inner man and of the members; which many have not rightly understood, and have therefore stumbled at this stone. The inner man then is not simply the soul, but that spiritual part which has been regenerated by God; and the members signify the other remaining part; for as the soul is the superior, and the body the inferior part of man, so the spirit is superior to the flesh. Then as the spirit takes the place of the soul in man, and the flesh, which is the corrupt and polluted soul, that of the body, the former has the name of the inner man, and the latter has the name of members. The inner man has indeed a different meaning in 2 Corinthians 4:16; but the circumstances of this passage require the interpretation which I have given: and it is called the inner by way of excellency; for it possesses the heart and the secret feelings, while the desires of the flesh are vagrant, and are, as it were, on the outside of man. Doubtless it is the same thing as though one compared heaven to earth; for Paul by way of contempt designates whatever appears to be in man by the term members, that he might clearly show that the hidden renovation is concealed from and escapes our observation, except it be apprehended by faith.
Now since the law of the mind undoubtedly means a principle rightly formed, it is evident that this passage is very absurdly applied to men not yet regenerated; for such, as Paul teaches us, are destitute of mind, inasmuch as their soul has become degenerated from reason.