Verses 1-9 speak (1) of the mystery itself--God's gracious intention toward the human race, unknown in earlier times; and (2) of the man to whom, above others, it was given to make known the secret.
I. _The mystery_ is defined twice over. First, it consists in the fact that "in Christ Jesus through the gospel the Gentiles are co-heirs and co-incorporate and co-partners in the promise" (ver. 6); and secondly, it is "the unsearchable riches of Christ" (ver. 8). The latter phrase gathers to a point what is diversely expressed in the former.
Christ is, to St Paul, the centre and the sum of the mysteries of Divine truth, of the whole enigma of existence. In the parallel epistle he calls Him "the mystery of God--in whom are all the treasures of wisdom and knowledge hidden" (Col. ii. 2, 3: R.V.). The mystery of God, discovered in Christ, was hidden out of the sight and reach of previous times. Now, by the preaching of the gospel, it is made the common property of mankind (Col. i. 25-28).
In close connexion with these statements, St Paul speaks there, as he does here, of his own heavy sufferings endured on this account and the joy they gave him. He is the instrument of a glorious purpose worthy of God; he is the mouthpiece of a revelation waiting to be spoken since the world began, that is addressed to all mankind and interests heaven along with earth. The greatness of his office is commensurate with the greatness of the truth given him to announce.
The mystery, as we have said, consists in _Christ_. This we learned from chapter i. 4, 5, and 9, 10. In Christ the Eternal lodged His purpose and laid His plans for the world. It is His fulness that the fulness of the times dispenses. The Old Testament, the reservoir of previous revelation, had Him for its close-kept secret, "held in silence through eternal times" (Rom. xvi. 25-27). The drift of its prophecies, the focus of its converging lights, the veiled magnet towards which its spiritual indications pointed, was "Christ." He "was the spiritual rock that followed" Israel in its wanderings, from whose springs the people drank, as it answered to the touch of one and now another of the holy men of old. The revelation of Jesus Christ gives unity, substance, and meaning to the history of Israel, which is otherwise a pathway without goal, a problem without solution. Priest and prophet, law and sacrifice; the kingly Son of David, and the suffering Servant of Jehovah; the Seed of the woman with bruised foot bruising the serpent's head; the Lord whom His people seek, suddenly coming to His temple; the Stone hewn from the mountains without hands, that grows till it fills the earth--the manifold representations of Israel's ideal, centre in the Lord Jesus Christ. The lines of the great figure drawn on the canvas of prophecy--disconnected as they seemed and without a plan, giving rise to a thousand dreams and speculations--are filled out and drawn into shape and take life and substance in Him. They are found to be parts of a consistent whole, sketches and studies of this fragment or of that belonging to the consummate Person and the comprehensive plan manifest in the revelation of Jesus Christ.