Romans 11:19

A believing Gentile says that he can rejoice that the Jews did not believe, saying that their condemnation made room for the Gentiles. But the Jews were not condemned by God in order to let the Gentiles in. They condemned themselves by rejecting God's gift, and by doing that they gave the Gentiles an opportunity to be saved. Paul wants to stop this boasting, so that we might rejoice in our salvation rather than insult the weak. For the man who insults a sinner is easily deceived.

When you were stripped you were anointed with exorcised olive oil, from the topmost hairs of your head to the soles of your feet, and became partakers of the good olive tree, Jesus Christ. Cuttings from the wild olive tree, you were grafted into the good olive tree and became partakers of the richness of the true olive tree.

"Thou wilt say then," he goes on, "The branches were broken off that I might be grafted in."

Again he establishes, by way of objection, the opposite to the former position, to show that what he said before, he had not said as directly belonging to the subject, but to draw them to him. For it was no longer by their fall that salvation came to the Gentiles, nor was it their fall that was the riches of the world. Nor was it by this that we were saved, because they had fallen, but the reverse. And he shows that the providence in regard to the Gentiles was a main object, even though he seems to put what he says into another form. And the whole passage is a tissue of objections, in which he clears himself of the suspicion of hatred, and makes his language such as will be acceptable.

Here he proves that the Gentiles were not chosen in place of the Jews because the Jews sinned, but for the faith which the Gentiles displayed. So where he seems to cast down the Gentile, there he shows that the fall of the Jews was inexcusable. But he corrects both groups. You, Gentile, will say that the branches were broken off so that you might be grafted in? Yes, they were broken off, but by their own unbelief, and not because God owed you that honor: for "you stand by faith," having been grafted into the root. Therefore "be afraid," because the grafting in is not a matter of nature, but of faith.

Then when he says, you will say then, he excludes an objection from the gentiles:
first, he presents the objection;
second, he excludes it from a consideration of divine justice, at well;
third, he urges them to diligently consider God's judgments, at see then the goodness.

First, therefore, he says: therefore, O gentile, who boasts against the Jews, you might say: the branches were broken off that I might be grafted in, i.e., God permitted the Jews to fall from faith, so that I might enter into faith.

But no one accepts the loss of one thing save for something more precious and more desired, just as a physician allows a foot to remain sore in order to heal the eye. Thus, it would seem that the gentile nations are more valuable and acceptable to God than Judea. Hence it says in Malachi: I have no pleasure in you, says the Lord of hosts, and I will not accept an offering from your hands. For from the rising of the sun to its setting my name is great among the nations (Mal 1:10), and in Isaiah: it is too light a thing that you should be my servant to raise up the tribes of Jacob; I will give you as a light to the nations (Isa 49:6).