Romans 9:10

“And not only this, etc..] This instance of Ishmael and Isaac, is not the only one, proving that Abraham's natural seed, the children of the flesh, are not all children, the children of God: but when Rebecca also had conceived by one, even by our father Isaac, “it was said unto her”, (<450912>Romans 9:12), being in a parenthesis, “the elder shall serve the younger”. The apostle was aware, that the Jews would be ready to say, that the instance of Ishmael and Isaac was not a pertinent one; since Ishmael was not born of Sarah, the lawful wife of Abraham, but of a bondwoman, which was the reason his rejection, when Isaac was the son of promise, by the lawful wife, and that they were children of…”

“And not only this; but when Rebecca, &c.--It might be thought that there was a natural reason for preferring the child of Sarah, as being Abraham's true and first wife, both to the child of Hagar, Sarah's maid, and to the children of Keturah, his second wife. But there could be no such reason in the case of Rebecca, Isaac's only wife; for the choice of her son Jacob was the choice of one of two sons by the same mother and of the younger in preference to the elder, and before either of them was born, and consequently before either had done good or evil to be a ground of preference: and all to show that the sole ground of distinction lay in the unconditional choice of God--"not of works, but…”

“And not only this - Not only is the principle of making a distinction among the natural descendants of Abraham thus settled by the promise, but it is still further seen and illustrated in the birth of the two sons of Isaac. He had shown that the principle of thus making a distinction among the posterity of Abraham was recognised in the original promise, thus proving that all the descendants of Abraham were not of course to be saved; and he now proceeds to show that the principle was recognised in the case of his posterity in the family of Isaac. And he shows that it is not according to any natural principles that the selection was made; that he not only made a distinction between Jacob and…”

“And that God's blessing does not belong to all the descendants of Abraham, appears not only by this instance, but by that of Esau and Jacob, who was chosen to inherit the blessing, before either of them had done good or evil. The apostle mentions this to show, that neither were their ancestors accepted through any merit of their own. That the purpose of God according to election might stand - Whose purpose was, to elect or choose the promised seed. Not of works - Not for any preceding merit in him he chose. But of him that called - Of his own good pleasure who called to that privilege whom he saw good. Romans 9:12”

“9:10-11 she gave birth to twins: No human circumstances differentiated Isaac’s sons, Jacob and Esau. Not only were they born to the same mother, but they were also conceived at the same time. Instead, Paul argues, the difference between them was of God’s choosing.”

“not only: Rom 5:3, Rom 5:11; Luk 16:26 but when: Gen 25:21-23, Rebekah Romans 9:11”