Jesus Christ was a minister of the circumcision - To show the Gentiles the propriety of bearing with the scrupulous Jews, he shows them here that they were under the greatest obligations to this people; to whom, in the days of his flesh, Jesus Christ confined his ministry; giving the world to see that he allowed the claim of the Jews as having the first right to the blessings of the Gospel. And he confined his ministry thus to the Jews, to confirm the truth of God, contained in the promises made unto the patriarchs; for God had declared that thus it should be; and Jesus Christ, by coming according to the promise, has fulfilled this truth, by making good the promises: therefore, salvation is of the Jews, as a kind of right conveyed to them through the promises made to their fathers. But this salvation was not exclusively designed for the Jewish people; as God by his prophets had repeatedly declared.
Now I say - I affirm, or maintain. I, a “Jew,” admit that his work had reference to the Jews; I affirm also that it had reference to the Gentiles.
That Jesus Christ - That “the Messiah.” The force of the apostle‘s reasoning would often be more striking if he would retain the word “Messiah,” and not regard the word “Christ” as a mere surname. It is the name of his “office;” and to “a Jew” the name “Messiah” would convey much more than the idea of a mere proper name.
Was a minister of the circumcision - Exercized his office - the office of the Messiah - among the Jews, or with respect to the Jews, for the purposes which he immediately specifies. He was born a Jew; was circumcised; came “to” that nation; and died in their midst, without having gone himself to any other people.
For the truth of God - To confirm or establish the truth of the promises of God. He remained among them in the exercise of his ministry, to show that God was “true,” who had said that the Messiah should come to them.
To confirm the promises - To “establish,” or to show that the promises were true; see the note at Acts 3:25-26. The “promises” referred to here, are those particularly which related to the coming of the Messiah. By thus admitting that the Messiah was the minister of the circumcision, the apostle conceded all that the Jew could ask, that he was to be peculiarly “their” Messiah; see the note at Luke 24:47.