For I speak to you Gentiles,.... The church at Rome, as the primitive churches for the most part did, consisted of Jews and Gentiles; hence the apostle sometimes addresses the one, as in Ro 2:17, and sometimes the other, as here; and this he does to observe unto them the grace and goodness of God, in enriching them with the Gospel of salvation; and that they might not despise the Jews, from whom it first came out, and through whose fall it came to them, and was preached among them by some of that nation:in as much as I am the apostle of the Gentiles.
He was ordained and set apart by God, in his eternal purposes, to be a teacher of the Gentiles; he was sent immediately by Christ to bear his name among them, though not among them only, to the exclusion of the people of Israel; he chiefly preached the Gospel to them, though sometimes to the Jews also; and the success of his ministry was mostly among the uncircumcision, though he sought by all ways and means to gain both Jews and Gentiles: hence he addresses the Gentiles with greater freedom and boldness, because he was their apostle, and had been so useful among them; and is a reason why we Gentiles should have a special regard to his writings; for though every word of God is pure, and all Scripture is divinely inspired, and is profitable on one account or other; nor is any part of it to be slighted and neglected; yet as Paul's epistles are written chiefly to the Gentile churches, excepting that to the Hebrews, and which some question whether it is his, they ought especially to be attended to by us; though, alas, of all the inspired writings they are had in the least esteem:I magnify mine office: not himself, for he was not of a self-exalting spirit, but humble and lowly minded, ready at all times to own himself to be less than the least of saints and the chief of sinners; but his office, which he had received from Christ, as an instance of his grace and favour.