The Apostle Paul
Romans 15:20ESV·traditional attribution

and thus I make it my ambition to preach the gospel, not where Christ has already been named, lest I build on someone else’s foundation,

John Calvin Reformed @genevareformer

20. Thus striving to preach the gospel, etc. As it was necessary for Paul not only to prove himself to be the servant of Christ and a pastor of the Christian Church, but also to show his title to the character and office of an Apostle, that he might gain the attention of the Romans, he mentions here the proper and peculiar distinction of the...

Matthew Henry Presbyterian @wholebiblehenry

The apostle here gives some account of himself and of his own affairs. Having mentioned his ministry and apostleship, he goes on further to magnify his office in the efficacy of it, and to mention to the glory of God the great success of his ministry and the wonderful things that God had done by him, for encouragement to the Christian church at Rome, that...

Commenting on Romans 15:17-21

John Gill Reformed Baptist @doctorgill

But as it is written,.... In Isa 52:15; to whom he was not spoken of, they shall see, and they that have not heard shall understand; for the Messiah was not spoken of to the Gentiles; they were strangers to the covenants of promise; the oracles of God were committed to the Jews; God gave his word and statutes to them, and not to any...