39 As for the men of stature who shall come over to Him and follow Him in chains, there is no doubt who they are. Turn to the Gospels; Peter, when he is to follow his Lord, is girded up. Read the Apostles: Paul, the servant of Christ, boasts of his bonds. Let us see whether this 'prisoner of Jesus Christ' conforms in his teaching to the prophecies uttered by God concerning God His Son. God had said, They shall make supplication, for God is in You. Now mark and digest these words of the Apostle:— God was in Christ, reconciling the world to Himself. And then the prophecy continues, And there is no God beside You.
The Apostle promptly matches this with For there is one Jesus Christ our Lord, through Whom are all things. Obviously there can be none other but He, for He is One. The third prophetic statement is, You are God and we knew it not. But Paul, once the persecutor of the Church, says, Whose are the fathers, from Whom is Christ, Who is God over all. Such is to be the message of these men in chains; men of stature, indeed, they will be, and shall sit on twelve thrones to judge the tribes of Israel, and shall follow their Lord, witnesses to Him in teaching and in martyrdom.
Source: On the Trinity (New Advent)