Observe here too how cautiously he expresses himself; he does not say that they had abandoned the Law as evil, but as weak. If the law cannot confer righteousness, it follows that circumcision is superfluous; and so far he now proves; but he proceeds to show that it is not only superfluous but dangerous. It deserves special notice, how at the outset he says that a man is not justified by the works of the Law; but as he proceeds he speaks more strongly;
Ver. 17. “But if, while we sought to be justified in Christ, we ourselves also were found sinners is Christ a minister of sin?”
If faith in Him, says he, avail not for our justification, but it be necessary again to embrace the Law, and if, having forsaken the Law for Christ's sake, we are not justified but condemned for such abandonment,— then shall we find Him, for whose sake we forsook the Law and went over to faith the author of our condemnation. Observe how, he has resolved the matter to a necessary absurdity. And mark how earnestly and strongly he argues. For if, he says, it behooved us not to abandon the Law, and we have so abandoned it for Christ's sake, we shall be judged. Wherefore do you urge this upon Peter, who is more intimately acquainted with it than any one? Hath not God declared to him, that an uncircumcised man ought not to be judged by circumcision; and did he not in his discussion with the Jews rest his bold opposition upon the vision which he saw? Did he not send from Jerusalem unequivocal decrees upon this subject? Paul's object is not therefore to correct Peter, but his animadversion required to be addressed to him, though it was pointed at the disciples; and not only at the Galatians, but also at others who labor under the same error with them. For though few are now circumcised, yet, by fasting and observing the sabbath with the Jews, they equally exclude themselves from grace. If Christ avails not to those who are only circumcised, much more is peril to be feared where fasting and sabbatizing are observed, and thus two commandments of the Law are kept in the place of one. And this is aggravated by a consideration of time: for they so acted at first while the city and temple and other institutions yet existed; but these who with the punishment of the Jews, and the destruction of the city before their eyes, observe more precepts of the Law than the others did, what apology can they find for such observance, at the very time when the Jews themselves, in spite of their strong desire, cannot keep it? You have put on Christ, you have become a member of the Lord, and been enrolled in the heavenly city, and do you still grovel in the Law? How is it possible for you to obtain the kingdom? Listen to Paul's words, that the observance of the Law overthrows the Gospel, and learn, if you will, how this comes to pass, and tremble, and shun this pitfall. Wherefore do you keep the sabbath, and fast with the Jews? Is it that you fear the Law and abandonment of its letter? But you would not entertain this fear, did you not disparage faith as weak, and by itself powerless to save. A fear to omit the sabbath plainly shows that you fear the Law as still in force; and if the Law is needful, it is so as a whole, not in part, nor in one commandment only; and if as a whole, the righteousness which is by faith is little by little shut out. If you keep the sabbath, why not also be circumcised? And if circumcised, why not also offer sacrifices? If the Law is to be observed, it must be observed as a whole, or not at all. If omitting one part makes you fear condemnation, this fear attaches equally to all the parts. If a transgression of the whole is not punishable, much less is the transgression of a part; on the other hand, if the latter be punishable, much more is the former. But if we are bound to keep the whole, we are bound to disobey Christ, or by obedience to Him become transgressors of the Law. If it ought to be kept, those who keep it not are transgressors, and Christ will be found to be the cause of this transgression, for He annulled the Law as regards these things Himself, and bid others annul it. Do you not understand what these Judaizers are compassing? They would make Christ, who is to us the Author of righteousness, the Author of sin, as Paul says, “Therefore Christ is the minister of sin.” Having thus reduced the proposition to an absurdity, he had nothing further to do by way of overthrowing it, but was satisfied with the simple protestation,
Ver. 17. “God forbid:” for shamelessness and irreverence need not be met by processes of reasoning, but a mere protest is enough.
Ver. 18. “For if I build up again those things which I destroyed, I prove myself a transgressor.”
Observe the Apostle's discernment; his opponents endeavored to show, that he who kept not the Law was a transgressor, but he retorts the argument upon them, and shows that he who did keep the Law was a transgressor, not merely of faith, but of the Law itself. “I build up again the things which I destroyed,” that is, the Law; he means as follows: the Law has confessedly ceased, and we have abandoned it, and betaken ourselves to the salvation which comes of faith. But if we make a point of setting it up again, we become by that very act transgressors, striving to keep what God has annulled. Next he shows how it has been annulled.
Ver. 19. “For I through the Law died unto the Law.”
This may be viewed in two ways; it is either the law of grace which he speaks of, for he is wont to call this a law, as in the words, “For the law of the Spirit of life made me free:” or it is the old Law, of which he says, that by the Law itself he has become dead to the Law. That is to say, the Law itself has taught me no longer to obey itself, and therefore if I do so, I shall be transgressing even its teaching. How, in what way has it so taught? Moses says, speaking of Christ, “The Lord God will raise up unto you a Prophet from the midst of you of your brethren, like me; unto Him shall you hearken.” Therefore they who do not obey Him, transgress the Law. Again, the expression, “I through the Law died unto the Law,” may be understood in another sense: the Law commands all its precepts to be performed, and punishes the transgressor; therefore we are all dead to it, for no man has fulfilled it. Here observe, how guardedly he assails it; he says not, “the Law is dead to me;” but, “I am dead to the Law;” the meaning of which is, that, as it is impossible for a dead corpse to obey the commands of the Law, so also is it for me who have perished by its curse, for by its word am I slain. Let it not therefore lay commands on the dead, dead by its own act, dead not in body only, but in soul, which has involved the death of the body. This he shows in what follows:
<!--<span class="stiki"></span>-->Ver. 19, 20. “That I might live unto God, I have been crucified with Christ.”
Having said, “I am dead,” lest it should be objected, how then do you live? He adds the cause of his living, and shows that when alive the Law slew him, but that when dead Christ through death restored him to life. He shows the wonder to be twofold; that by Christ both the dead was begotten into life, and that by means of death. He here means the immortal life, for this is the meaning of the words, “That I might live unto God I am crucified with Christ.” How, it is asked, can a man now living and breathing have been crucified? That Christ has been crucified is manifest, but how can you have been crucified, and yet live? He explains it thus;
Ver. 20. “Yet I live; and yet no longer I, but Christ lives in me.”
Source: Commentary on Galatians (New Advent)