7:14 {8} For we know that the law is spiritual: but I am carnal, sold under sin.
(8) The law is the cause of this matter because the it requires a heavenly purity, but when men are born, they are bondslaves of corruption, which they willingly serve.
7:14 For we know that the law is spiritual. The apostle continues still further to show that, not the law, but sin is the source of death. The law is spiritual, that is, is divine and adapted to our spiritual nature. While there were carnal ordinances, its essential principles were spiritual.
But I am carnal. Paul describes his condition while under the law. It was spiritual; but he was carnal, and hence, there was a conflict.
Sold under sin. Hence, in a state of slavery. Though Paul uses the present tense, in order to make the description more vivid, he describes his condition before he became a Christian.
7:14 I am carnal - St. Paul, having compared together the past and present state of believers, that in the flesh, Rom 7:5, and that in the spirit, Rom 7:6, in answering two objections, (Is then the law sin? Rom 7:7, and, Is the law death? Rom 7:13,) interweaves the whole process of a man reasoning, groaning, striving, and escaping from the legal to the evangelical state. This he does from Rom 7:7, to the end of this chapter . Sold under sin - Totally enslaved; slaves bought with money were absolutely at their master's disposal.
7:14-17 Compared with the holy rule of conduct in the law of God, the apostle found himself so very far short of perfection, that he seemed to be carnal; like a man who is sold against his will to a hated master, from whom he cannot set himself at liberty. A real Christian unwillingly serves this hated master, yet cannot shake off the galling chain, till his powerful and gracious Friend above, rescues him. The remaining evil of his heart is a real and humbling hinderance to his serving God as angels do and the spirits of just made perfect. This strong language was the result of St. Paul's great advance in holiness, and the depth of his self-abasement and hatred of sin. If we do not understand this language, it is because we are so far beneath him in holiness, knowledge of the spirituality of God's law, and the evil of our own hearts, and hatred of moral evil. And many believers have adopted the apostle's language, showing that it is suitable to their deep feelings of abhorrence of sin, and self-abasement. The apostle enlarges on the conflict he daily maintained with the remainder of his original depravity. He was frequently led into tempers, words, or actions, which he did not approve or allow in his renewed judgement and affections. By distinguishing his real self, his spiritual part, from the self, or flesh, in which sin dwelt, and by observing that the evil actions were done, not by him, but by sin dwelling in him, the apostle did not mean that men are not accountable for their sins, but he teaches the evil of their sins, by showing that they are all done against reason and conscience. Sin dwelling in a man, does not prove its ruling, or having dominion over him. If a man dwells in a city, or in a country, still he may not rule there.