6. To answer this question we must observe the meaning and purpose of Paul's words; for he so speaks because of the boasting of the Jews, who placed their dependence on the Law and claimed that it was given to them that they might be God's people. They considered their attempts at keeping his Law, sufficient to procure justification. Why else did God give the Law, they said, and distinguish us from all heathen peoples, if we were not thereby to be preëminent before God and more pleasing to him than they who have it not? They made so much of this boasting that they paid no respect at all to the promise of blessing in the coming seed, given to the fathers, nor thought that faith therein was necessary to their justification. Thus they practically considered it as annulled and made void, excepting for a temporal interpretation which they put upon it—that the Messiah would come and, because of their Law and piety, give to them the dominion of the world and other great rewards.
THE JEWS GOD'S PEOPLE BY PROMISE.
7. To rout such vain delusions and boasts, and to show that the Jews were not justified through the Law and did not become God's children thereby, Paul cites the fact that the holy patriarchs, their fathers, were justified neither by the Law of which they boast, because it was not yet given, nor by their own deeds, whether of the natural law or the ten commandments. God had based no promise of blessing or salvation on their works. He had promised out of pure grace to give them the blessing freely (that is, to give them grace or righteousness and all eternal blessing), through the coming seed, which had been promised also to our first parents without their merit, when by their transgression they had fallen under God's wrath and condemnation. Therefore, although the fathers had a knowledge of the Law, or God's commandments, these did not help them to become righteous before God. They had to hear and apprehend by faith the promise of God, which was based not on works but only on the coming seed. For if they had been able by means of the Law or of good works to become righteous, it would have been wholly unnecessary to give the promise of blessing in Christ.
8. Now, if Abraham and the fathers could not be justified by works, and in fact were not justified by them, no more were their children and descendants justified by the Law or by works. They were justified in no other way than by faith in the promise given to Abraham and to his seed, a promise by which not only the Jews but all the heathen (through the same faith) were blessed.
9. This truth Paul now further enforces and establishes on the basis of these two particulars—God's promise, and his free grace or gift—in opposition to the boasting of the Law and our own merit. First, he makes a declaration concerning the value and weight which every testament or promise of the last will possesses. Likewise in the fourth commandment is implied an ordinance that the last will of parents should be honored by their children and heirs.
10. In regard to this subject he asserts that the rule is, if a man's testament be confirmed (and it is confirmed by his death) no man dare alter it nor add to it nor take away from it. So the jurists declare it to be a divine law that no one should break a man's last will. How much more then should God's testament be honored intact? Now, God has made a testament, which is to be his final last will; namely, that he will bless all nations through the seed which at first he promised to the fathers. This he determined upon, and assured to Abraham, and in him to all the world—to us all. And he has confirmed it by the death of this seed, his only Son, who had to become man and die (as was typified by the sacrifice of Isaac on the part of Abraham) in order that the inheritance of the blessing and eternal life might be bestowed upon us. This is God's last will. He does not desire to make any other. Therefore, no man can or dare change it or add anything to it. Now, it is adding to it, it is breaking or revoking it—since this testament has been opened and the blessing proclaimed to all the world—if anyone claims that we must first earn that blessing through the Law, proceeding as if, without the Law, this testament, by mere virtue of its promise and will, had no force at all.
11. In short, this testament, Paul concludes, is a simple promise of blessing and sonship with God. Accordingly, there is no law which we must keep in order to merit it. Here nothing avails but the will which promises saying, I will not regard your deeds, but promise the blessing—that is, grace and eternal life—to you who are found in sin and death. This I will confirm by the death of my Son, who shall merit and obtain this inheritance for you.
Now, God made this testament in the first place without the Law, and has thus confirmed it; therefore, the Law, published and confirmed long afterwards, cannot take aught from it, much less annul or revoke it. And he who declares or teaches that we are to be justified by the Law—are to obtain God's blessing by it—does nothing else but interfere with God's testament and destroy and annul his last will. This is one argument of Paul, based on the word "promise," or "testament," and is readily understood; for no one is so stupid that he cannot distinguish between these two—law or commandment, and promise.
12. The second argument of Paul is based on the words, "God gave it to Abraham by promise." Here also it is easy for one who is possessed of common sense to perceive there is a marked difference between receiving something as a gift and earning it. What is earned is given because of obligation and debt, as wages, and he who receives it may boast of it, rather than he who gives it, and may insist upon his right. But when something is given for nothing and, as Paul here says, is bestowed freely—out of grace—then there can be no boasting of right or of merit on the part of the recipient. On the contrary, he must praise the goodness and kindness of his benefactor. So Paul concludes: God freely gave the blessing and the inheritance to Abraham by promise. Therefore, Abraham did not earn it by his works; nor was it given to him as a reward, much less to his children.
13. It is evident enough to even a child that what is earned by works as a reward is not identical with what is promised or bestowed gratis, out of grace and pure free will. There is a distinction between them. God has stopped the mouth of all the world and deprived it of all occasion for boasting that it has received God's grace by reason of the Law. For he promised and bestowed that as a gift, before the Law or merit through the Law had any existence. In his dealings with his own people, with Abraham and his descendants, God promised to bless the patriarch and all his race and said nothing of any law, works or reward; he based all solely on the coming seed.