15:14-21 The apostle was persuaded that the Roman Christians were filled with a kind and affectionate spirit, as well as with knowledge. He had written to remind them of their duties and their dangers, because God had appointed him the minister of Christ to the Gentiles. Paul preached to them; but what made them sacrifices to God, was, their sanctification; not his work, but the work of the Holy Ghost: unholy things can never be pleasing to the holy God. The conversion of souls pertains unto God; therefore it is the matter of Paul's glorying, not the things of the flesh. But though a great preacher, he could not make one soul obedient, further than the Spirit of God accompanied his labours. He principally sought the good of those that sat in darkness. Whatever good we do, it is Christ who does it by us.
19. Through mighty—literally, "in the power of"
signs and wonders—that is, glorious miracles.
by the power of the Spirit of God—"the Holy Ghost," as the true reading seems to be. This seems intended to explain the efficacy of the word preached, as well as the working of the miracles which attested it.
so that from Jerusalem, and round about unto—"as far as"
Illyricum—to the extreme northwestern boundary of Greece. It corresponds to the modern Croatia and Dalmatia (2Ti 4:10). See Ac 20:1, 2.
I have fully preached the gospel of Christ.