The Apostle Paul
Romans 15:8ESV·traditional attribution

For I tell you that Christ became a servant to the circumcised to show God’s truthfulness, in order to confirm the promises given to the patriarchs,

John Calvin Reformed @genevareformer

8. Now I say, that Jesus Christ, etc. He now shows that Christ has embraced us all, so that he leaves no difference between the Jews and the Gentiles, except that in the first place he was promised to the Jewish nation, and was in a manner peculiarly destined for them, before he was revealed to the Gentiles.

Matthew Henry Presbyterian @wholebiblehenry

The apostle here returns to his exhortation to Christians. What he says here (Rom 15:7) is to the same purport with the former; but the repetition shows how much the apostle's heart was upon it. "Receive one another into your affection, into your communion, and into your common conversation, as there is occasion." He had exhorted the strong to receive the weak (Rom 14:1), here...

Commenting on Romans 15:7-12

John Gill Reformed Baptist @doctorgill

And that the Gentiles might glorify God for his mercy,.... In choosing them in Christ as vessels of mercy, and in redeeming them by Christ as well as the Jews, and in regenerating and calling them by his abundant grace; and which as they clearly show that Christ has received them, and therefore are not to be censured and judged as irreligious persons, because of...