Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:

People's New Testament

9:6 Not as though the word of God hath taken none effect. The Jew might reply, Why, then, if Israel had such privileges, covenants and promises, is the nation rejected? Has God, if Jesus is really the Christ, made his word of none effect ? The apostle in the rest of the chapter answers this objection.

They are not all Israel, which are of Israel. The first point is that there is a wider, greater Israel than that of the flesh. There is an Israel according to the promise as well as according to the flesh.

Wesley's Notes

9:6 Not as if - The Jews imagined that the word of God must fail if all their nation were not saved. This St. Paul now refutes, and proves that the word itself had foretold their falling away. The word of God - The promises of God to Israel. Had fallen to the ground - This could not be. Even now, says the apostle, some enjoy the promises; and hereafter all Israel shall be saved. This is the sum of the ninth, tenth, and eleventh chapter s. For - Here he enters upon the proof of it. All are not Israel, who are of Israel - The Jews vehemently maintained the contrary; namely, that all who were born Israelites, and they only, were the people of God. The former part of this assertion is refuted here, the latter, Rom 9:24, and c. The sum is, God accepts all believers, and them only; and this is no way contrary to his word. Nay, he hath declared in his word, both by types and by express testimonies, that believers are accepted as the children of the promise, while unbelievers are rejected, though they are children after the flesh. All are not Israel - Not in the favour of God. Who are lineally descended of Israel.

Scofield Reference Notes

[1] For they are not all Israel

The distinction is between Israel after the flesh, the mere natural posterity of Abraham, and Israelites who, through faith, are also Abraham's spiritual children. Gentiles who believe are also of Abraham's spiritual seed; but here the apostle is not considering them, but only the two kinds of Israelites, the natural and the spiritual Israel. (Rom 4:1-3 Gal 3:6,7 Jn 8:37-39.)

See Scofield Note: "Rom 11:1".

Jamieson-Fausset-Brown Bible Commentary

6. Not as though the word of God had taken none effect-"hath fallen to the ground," that is, failed: compare Lu 16:17, Greek.

for they are not all Israel which are of Israel-better, "for not all they which are of Israel are Israel." Here the apostle enters upon the profound subject of Election, the treatment of which extends to the end of the eleventh chapter-"Think not that I mourn over the total loss of Israel; for that would involve the failure of God's word to Abraham; but not all that belong to the natural seed, and go under the name of 'Israel,' are the Israel of God's irrevocable choice." The difficulties which encompass this subject lie not in the apostle's teaching, which is plain enough, but in the truths themselves, the evidence for which, taken by themselves, is overwhelming, but whose perfect harmony is beyond human comprehension in the present state. The great source of error here lies in hastily inferring (as Tholuck and others), from the apostle's taking tip, at the close of this chapter, the calling of the Gentiles in connection with the rejection of Israel, and continuing this subject through the two next chapters, that the Election treated of in the body of this chapter is national, not personal Election, and consequently is Election merely to religious advantages, not to eternal salvation. In that case, the argument of Ro 9:6, with which the subject of Election opens, would be this: "The choice of Abraham and his seed has not failed; because though Israel has been rejected, the Gentiles have taken their place; and God has a right to choose what nation He will to the privileges of His visible kingdom." But so far from this, the Gentiles are not so much as mentioned at all till towards the close of the chapter; and the argument of this verse is, that "all Israel is not rejected, but only a portion of it, the remainder being the 'Israel' whom God has chosen in the exercise of His sovereign right." And that this is a choice not to mere external privileges, but to eternal salvation, will abundantly appear from what follows.

Matthew Henry's Concise Commentary

9:6-13 The rejection of the Jews by the gospel dispensation, did not break God's promise to the patriarchs. The promises and threatenings shall be fulfilled. Grace does not run in the blood; nor are saving benefits always found with outward church privileges. Not only some of Abraham's seed were chosen, and others not, but God therein wrought according to the counsel of his own will. God foresaw both Esau and Jacob as born in sin, by nature children of wrath even as others. If left to themselves they would have continued in sin through life; but for wise and holy reasons, not made known to us, he purposed to change Jacob's heart, and to leave Esau to his perverseness. This instance of Esau and Jacob throws light upon the Divine conduct to the fallen race of man. The whole Scripture shows the difference between the professed Christian and the real believer. Outward privileges are bestowed on many who are not the children of God. There is, however, full encouragement to diligent use of the means of grace which God has appointed.