Luther's Law/Gospel Distinction (in his commentary on Galatians 3:19-22)

In this passage Paul continues his multiple arguments for why obedience to the Old Testament Law cannot be a requirement or basis for justification.  He first argued from its timing, or the fact that the promise of the gospel came to Abraham long before the law was given to Moses (vv. 15-18, see my last post.)  He will go on to argue from the temporary nature of the OT Law (vv. 23-28, see my next post), but here he argues from the purpose of the law...

"Why the Law then? It was added because of transgressions, having been ordained through angels by the [ad]agency of a mediator, until the seed would come to whom the promise had been made. Now a mediator is not for one party only; whereas God is only one. Is the Law then contrary to the promises of God? May it never be! For if a law had been given which was able to impart life, then righteousness would indeed have been based on law. But the Scripture has shut up everyone under sin, so that the promise by faith in Jesus Christ might be given to those who believe."

I want to let Martin Luther speak to this primarily, since the law/gospel distinction was such a distinctive of his teaching.  But I wanted to say a word first about how he is often criticized for making too sharp of a distinction between the two.  That criticism certainly can't be made from his comments on Galatians 3, in my opinion, because Paul's whole point here is to make that distinction (regarding justification, of course).  Paul clearly distinguishes law and promise (i.e. the gospel) and in verse 12 even distinguishes it from faith (i.e. our saving response to the gospel).  The most cogent criticism of Luther I can think of is that Paul was talking about the Mosaic Law, while Luther applied it to the principle of law, which includes all the commands of God in Scripture, and good works in general rather than merely circumcision and other OT observances.  But that is the task of the expositor, to take the universal ideas communicated in the text and apply it to his current culture and situation. That's what Paul himself was doing in Galatians 3, in fact, and that's what Luther is doing in his commentary.

Notice how he did it not only with doctrinal clarity, but practical and pastoral concern for how it affected the daily lives of people...

The question naturally arises: If the Law was not given for righteousness or salvation, why was it given? Why did God give the Law in the first place if it cannot justify a person? The Jews believed if they kept the Law they would be saved. When they heard that the Gospel proclaimed a Christ who had come into the world to save sinners and not the righteous; when they heard that sinners were to enter the kingdom of heaven before the righteous, the Jews were very much put out. They murmured: "These last have wrought but one hour, and thou hast made them equal unto us, which have borne the burden and heat of the day." (Matthew 20:12.) They complained that the heathen who at one time had been worshipers of idols obtained grace without the drudgery of the Law that was theirs. Today we hear the same complaints. "What was the use of our having lived in a cloister, twenty, thirty, forty years; what was the sense of having vowed chastity, poverty, obedience; what good are all the masses and canonical hours that we read; what profit is there in fasting, praying, etc., if any man or woman, any beggar or scour woman is to be made equal to us, or even be considered more acceptable unto God than we?"

After explaining the first purpose of the law (to restrain evil in civil society), Luther gets to the heart of the matter...

The second purpose of the Law is spiritual and divine. Paul describes this spiritual purpose of the Law in the words, "Because of transgressions," i.e., to reveal to a person his sin, blindness, misery, his ignorance, hatred, and contempt of God, his death, hell, and condemnation. This is the principal purpose of the Law and its most valuable contribution. As long as a person is not a murderer, adulterer, thief, he would swear that he is righteous. How is God going to humble such a person except by the Law? The Law is the hammer of death, the thunder of hell, and the lightning of God's wrath to bring down the proud and shameless hypocrites. When the Law was instituted on Mount Sinai it was accompanied by lightning, by storms, by the sound of trumpets, to tear to pieces that monster called self-righteousness. As long as a person thinks he is right he is going to be incomprehensibly proud and presumptuous. He is going to hate God, despise His grace and mercy, and ignore the promises in Christ. The Gospel of the free forgiveness of sins through Christ will never appeal to the self-righteous. This monster of self-righteousness, this stiff-necked beast, needs a big axe. And that is what the Law is, a big axe. Accordingly, the proper use and function of the Law is to threaten until the conscience is scared stiff.

We want it understood that we do not reject the Law as our opponents claim. On the contrary, we uphold the Law. We say the Law is good if it is used for the purposes for which it was designed, to check civil transgression, and to magnify spiritual transgressions. The Law is also a light like the Gospel. But instead of revealing the grace of God, righteousness, and life, the Law brings sin, death, and the wrath of God to light. This is the business of the Law, and here the business of the Law ends, and should go no further. The business of the Gospel, on the other hand, is to quicken, to comfort, to raise the fallen. The Gospel carries the news that God for Christ's sake is merciful to the most unworthy sinners, if they will only believe that Christ by His death has delivered them from sin and everlasting death unto grace, forgiveness, and everlasting life. By keeping in mind the difference between the Law and the Gospel we let each perform its special task. Of this difference between the Law and the Gospel nothing can be discovered in the writings of the monks or scholastics, nor for that matter in the writings of the ancient fathers. Augustine understood the difference somewhat. Jerome and others knew nothing of it. The silence in the Church concerning the difference between the Law and the Gospel has resulted in untold harm. Unless a sharp distinction is maintained between the purpose and function of the Law and the Gospel, the Christian doctrine cannot be kept free from error.

The Law is a mirror to show a person what he is like, a sinner who is guilty of death, and worthy of everlasting punishment. What is this bruising and beating by the hand of the Law to accomplish? This, that we may find the way to grace. The Law is an usher to lead the way to grace. God is the God of the humble, the miserable, the afflicted. It is His nature to exalt the humble, to comfort the sorrowing, to heal the broken-hearted, to justify the sinners, and to save the condemned. The fatuous idea that a person can be holy by himself denies God the pleasure of saving sinners. God must therefore first take the sledge-hammer of the Law in His fists and smash the beast of self-righteousness and its brood of self-confidence, confidence, self-wisdom, self-righteousness, and self-help. When the conscience has been thoroughly frightened by the Law it welcomes the Gospel of grace with its message of a Savior who came into the world, not to break the bruised reed, nor to quench the smoking flax, but to preach glad tidings to the poor, to heal the broken-hearted, and to grant forgiveness of sins to all the captives. Man's folly, however, is so prodigious that instead of embracing the message of grace with its guarantee of the forgiveness of sin for Christ's sake, man finds himself more laws to satisfy his conscience. "If I live," says he, "I will mend my life. I will do this, I will do that." Man, if you don't do the very opposite, if you don't send Moses with the Law back to Mount Sinai and take the hand of Christ, pierced for your sins, you will never be saved. When the Law drives you to the point of despair, let it drive you a little farther, let it drive you straight into the arms of Jesus who says: "Come unto me, all ye that labour and are heavy laden, and I will give you rest."

Paul's references to a "mediator" (v. 20) and "the promise by faith in Jesus Christ" (v. 22) give Luther all the excuse he needs to talk about his favorite subject (yes, even more beloved than the law/gospel distinction), which is our wonderful Savior, and how we can have a personal relationship with him...

That better mediator is Jesus Christ. He does not change the voice of the Law, nor does He hide the Law with a veil. He takes the full blast of the wrath of the Law and fulfills its demands most meticulously.... The proverb has it that Hunger is the best cook. The Law makes afflicted consciences hungry for Christ. Christ tastes good to them. Hungry hearts appreciate Christ. Thirsty souls are what Christ wants. He invites them: "Come unto me, all ye that labour and are heavy laden, and I will give you rest." Christ's benefits are so precious that He will dispense them only to those who need them and really desire them.