16:25-27 That which establishes souls, is, the plain preaching of Jesus Christ. Our redemption and salvation by our Lord Jesus Christ, are, without controversy, a great mystery of godliness. And yet, blessed be God, there is as much of this mystery made plain as will bring us to heaven, if we do not wilfully neglect so great salvation. Life and immortality are brought to light by the gospel, and the Sun of Righteousness is risen on the world. The Scriptures of the prophets, what they left in writing, is not only made plain in itself, but by it this mystery is made known to all nations. Christ is salvation to all nations. And the gospel is revealed, not to be talked of and disputed about, but to be submitted to. The obedience of faith is that obedience which is paid to the word of faith, and which comes by the grace of faith. All the glory that passes from fallen man to God, so as to be accepted of him, must go through the Lord Jesus, in whom alone our persons and doings are, or can be, pleasing to God. Of his righteousness we must make mention, even of his only; who, as he is the Mediator of all our prayers, so he is, and will be, to eternity, the Mediator of all our praises. Remembering that we are called to the obedience of faith, and that every degree of wisdom is from the only wise God, we should, by word and deed, render glory to him through Jesus Christ; that so the grace of our Lord Jesus Christ may be with us for ever.
26. But is now made manifest—The reference here is to that peculiar feature of the Gospel economy which Paul himself was specially employed to carry into practical effect and to unfold by his teaching—the introduction of the Gentile believers to an equality with their Jewish brethren, and the new, and, to the Jews, quite unexpected form which this gave to the whole Kingdom of God (compare Eph 3:1-10, &c.). This the apostle calls here a mystery hitherto undisclosed, in what sense Ro 16:27 will show, but now fully unfolded; and his prayer for the Roman Christians, in the form of a doxology to Him who was able to do what he asked, is that they might be established in the truth of the Gospel, not only in its essential character, but specially in that feature of it which gave themselves, as Gentile believers, their whole standing among the people of God.
and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for—in order to
the obedience of faith—Lest they should think, from what he had just said, that God had brought in upon his people so vast a change on their condition without giving them any previous notice, the apostle here adds that, on the contrary, "the Scriptures of the prophets" contain all that he and other preachers of the Gospel had to declare on these topics, and indeed that the same "everlasting God," who "from eternal ages" had kept these things hid, had given "commandment" that they should now, according to the tenor of those prophetic Scriptures, be imparted to every nation for their believing acceptance.