Romans 4:13-14

Verse 13. For the promise, etc. To show that the faith of Abraham, on which his justification depended, was not by the law, the apostle proceeds to show that the promise concerning which his faith was so remarkably evinced was before the law was given. If this was so, then it was an additional important consideration in opposition to the Jew, showing that acceptance with God depended on faith, and not on works.

That he should be the heir of the world. An heir is one who succeeds, or is to succeed to an estate. In this passage, the world, or the entire earth, is regarded as the estate to which reference is made; and the promise is, that the posterity of Abraham should succeed to that, or should possess it as their inheritance. The precise expression here used, "heir of the world," is not found in the promises made to Abraham. Those promises were, that God would make of him a great nation, (Gen 12:2) that in him all the families of the earth should be blessed, Gen 12:3; that his posterity should be as the stars for multitude, Gen 15:5 and that he should be a father of many nations, Gen 17:5. As this latter promise is one to which the apostle particularly refers, (Rom 4:17) it is probable that he had this in his eye. This promise had, at first, respect to his numerous natural descendants, and to their possessing the land of Canaan. But it is also regarded in the New Testament as extending to the Messiah Gal 3:16 as his descendant, and to all his followers as the spiritual seed of the father of the faithful. When the apostle calls him "the heir of the world," he sums up in this comprehensive expression all the promises made to Abraham, intimating that his spiritual descendants, i.e. those who possess his faith shall yet be so numerous as to possess all lands.

Or to his seed. To his posterity, or descendants.

Through the law. By the observance of the law; or made in consequence of observing the law; or depending on the condition that he should observe the law. The covenant was made before the law of circumcision was given; and long before the law of Moses, (comp. Gal 3:16,17,18a) and was independent of both.

But through, etc. In consequence of, or in connexion with, the strong confidence which he showed in the promises of God, Gen 15:6.

(p) "he should be the heir" Gen 17:4, etc.
Verse 14. For if they which are of the law. Who seek for justification and acceptance by the law.

Faith is made void. Faith would have no place in the scheme; and consequently the strong commendations bestowed on the faith of Abraham, would be bestowed without any just cause. If men are justified by the law, they cannot be by faith, and faith would be useless in this work.

And the promise, etc. A promise looks to the future. Its design and tendency is to excite trust and confidence in him who makes it. All the promises of God have this design and tendency; and consequently, as God has given many promises, the object is to call forth the lively and constant faith of men, all going to show that, in the Divine estimation, faith is of inestimable value. But if men are justified by the law--if they are rendered acceptable by conformity to the institutions of Moses--then they cannot depend for acceptance on any promise made to Abraham, or his seed. They cut themselves off from that promise, and stand independent of it. That promise, like all other promises, was made to excite faith. If, therefore, the Jews depended on the law for justification, they were cut out from all the promises made to Abraham; and if they could be justified by the law, the promise was useless. This is as true now as it was then. If men seek to be justified by their morality, or their forms of religion, they cannot depend on any promise of God; for he has made no promise to any such attempt. They stand independently of any promise, covenant, or compact, and are depending on a scheme of their own; a scheme which would render his plan vain and useless; which would render his promises, and the atonement of Christ, and the work of the Spirit of no value. It is clear, therefore, that such an attempt at salvation cannot be successful.

(q) "For if they which are of the law" Gal 3:18
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