The Apostle Paul
Romans 15:19BSB·traditional attribution

by the power of signs and wonders, and by the power of the Spirit of God. So from Jerusalem all the way around to Illyricum, I have fully proclaimed the gospel of Christ.

John Calvin Reformed @genevareformer

19. So that from Jerusalem, etc. He joins also a testimony from the effect; for the success which followed his preaching exceeded all the thoughts of men. For who could have gathered so many churches for Christ, without being aided by the power of God?

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

Yea, so have I strived to preach the Gospel,.... The sense is, not barely that he strove to preach the Gospel and not the law, the pure Gospel, and, not a mixed one; nor only that he endeavoured to preach it fully, and leave out nothing; but that he had an holy ambition to preach it, not where Christ was named; as in Judea, where...