Romans 16:25-27 : Now to him who is able to establish you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery which bath been kept in silence through times eternal, but now is manifested, and by the scriptures of the prophets, according to the commandment of the eternal God, is made known unto all the nations unto obedience of faith: to the only wise God, through Jesus Christ, to whom be glory forever. A-men. These verses were written with Paul's own hands. It was his custom to write with his own hands the closing part of each let-ter as a means of showing the letter to be his. "The salutation of me Paul with mine own hand" (Colossians 4:18). "The salutation of me Paul with mine own hand, which is the token in every epistle" (2 Thessalonians 3:17).
"My gospel" was the gospel which Paul preached, and not the perverted gospel of the Judaizers; and "the preaching of Jesus Christ" was the preaching Jesus Christ commanded, and which had him as its center. And that was the gospel of salvation for all men with-out distinction as to races. Paul would have all Chris-tians established in the gospel he preached, and not in the perverted gospel of the Judaizers. Paul had quoted many prophecies to prove that Gentiles were to share in the promise made to the fathers but how either Jews or Gentiles were to enjoy the blessings of the Messiah had not been revealed by the prophets.
A mystery is a thing not understood. Neither Jew nor Gentile had grasped the idea that Gentiles were to be fellow-citizens in the kingdom of the Messiah. It seems that this truth had been more fully revealed by Paul than by any other apostle or prophet (Ephesians 3:1-8). Where this truth was clearly revealed, it could then be seen how this truth had been manifested in the scriptures of the prophets. It could also then be seen that it was all according to the commandment of God when the great commission was given. "Go ye there-fore, and make disciples of all the nations, baptizing them into the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:18; Mark 16:15-16). The prophets had foretold, and Jesus had commanded, "that repentance and remission of sins should be preached in his name unto all the nations (Luke 24:46-47).
But for quite a while the apostles did not grasp the significance of the command to preach to all nations. But these commands were made known to all nations that they might become obedient to the faith --obedient to the gospel. Notice how Paul begins and ends his commendation. "Now to him that is able to establish you according to my gospel--to the only wise God, through Jesus Christ, to whom be glory forever and ever. Amen."