Romans 10:19

Paul means here that of course Israel knew.… They all heard but they did not all believe.The jealousy of the Jews arose from their envy at seeing a people which earlier had been without God and barbarous claim the Jewish God as their own and …

By calling a people "foolish" Paul explained what he meant by "those who are not a people," viz., a foolish people ought not to be called a people at all. But he says that the Jewish people will be angered by the Gentiles' faith, because they have received what the Jews have rejected.… Even though entire peoples were foolish idol worshipers, they nevertheless put away their paganism by believing. Thus Paul said: "If a man who is uncircumcised keeps the precepts of the law, will not his uncircumcision be regarded as circumcision?" Thus he means: "I will make you jealous of those who once were not a people but were made a people," because although they were once a foolish idol-worshiping people, they put aside their paganism through their faith in Christ.

"But I say, Did not Israel know?" For what if they heard, he means, but did not know what was said, nor understand that these were the persons sent? Are they not to be forgiven for their ignorance? By no means. For Isaiah had described their character in the words, "How beautiful are the feet of them that preach the Gospel of peace." And before him the Lawgiver himself. Hence he proceeds. "First Moses saith, I will provoke you to jealousy by them that are no people, and by a foolish nation I will anger you." And so they ought even from him to have been able to distinguish the preachers, not from the fact of these disbelieving only, not from the fact of their preaching peace, not from the fact of their bringing the glad tidings of those good things, not from the word being sown in every part of the world, but from the very fact of their seeing their inferiors, those of the Gentiles, in greater honor. For what they had never heard, nor their forefathers, that wisdom did these on a sudden embrace. And this was a mark of such intense honor, as should gall them, and lead them to jealousy, and to recollection of the prophecy of Moses, which said, "I will provoke you to jealousy by them that are no people." For it was not the greatness of the honor alone that was enough to throw them upon jealousy, but the fact too that a nation had come to enjoy these things which was of so little account that it could hardly be considered a nation at all. "For I will provoke you to jealousy, by them which are no nation, and by a foolish nation will I anger you." For what more foolish than the Greeks (Heathen)? or what of less account? See how by every means God had given from of old indications and clear signs of these times, in order to remove their blindness. For it was not any little corner in which the thing was done, but in land, and in sea, and in every quarter of the globe.

And the same apostle owns that he bears witness to the Jews, "that they have a zeal of God, but not according to knowledge. For, being ignorant of God's righteousness, and seeking to establish their own, they have not submitted themselves to the righteousness of God." For they did not know and do the will of the law; but what they supposed, that they thought the law wished. And they did not believe the law as prophesying, but the bare word; and they followed through fear, not through disposition and faith. "For Christ is the end of the law for righteousness," who was prophesied by the law to every one that believeth. Whence it was said to them by Moses, "I will provoke you to jealousy by them that are not a people; and I will anger you by a foolish nation, that is, by one that has become disposed to obedience." And by Isaiah it is said, "I was found of them that sought Me not; I was made manifest to them that inquired not after Me," -manifestly previous to the coming of the Lord; after which to Israel, the things prophesied, are now appropriately spoken: "I have stretched out My hands all the day long to a disobedient and gainsaying people." Do you see the cause of the calling from among the nations, clearly declared, by the prophet, to be the disobedience and gainsaying of the people?

I raise again a new objection: if the apostles preached, but the Jews did not understand, do they not deserve to be excused? He resolves this objection as well. They, he says, should have understood that Christ was being preached, if not from anything else, …