Ambrosiaster : This is the mystery that has been hidden throughout the ages and generations, but is now revealed to His saints. For God wanted to make known to them the glorious riches of this mystery among the Gentiles, which is Christ in you, the hope of glory. For before the preaching of faith, the Gentiles were obligated to be circumcised if they desired to adhere to the Law. But now, by the mercy of God, they have been accepted as they are into the faith. This was viewed as unworthy by the Jews, that Christ, in whom the hope of the Jews resided, would also make the Gentiles partakers of his glory. — Commentary on Colossians Clement of Alexandria : For there is an instruction of the perfect, of which, writing to the Colossians, he says, "We cease not to pray for you, and beseech that ye may be filled with the knowledge of His will in all wisdom and spiritual understanding; that ye may walk worthy of the Lord to all pleasing; being fruitful in every good work, and increasing in the knowledge of God; strengthened with all might according to the glory of His power." And again he says, "According to the disposition of the grace of God which is given me, that ye may fulfil the word of God; the mystery which has been hid from ages and generations, which now is manifested to His saints: to whom God wished to make known what is the riches of the glory of this mystery among the nations." So that, on the one hand, then, are the mysteries which were hid till the time of the apostles, and were delivered by them as they received from the Lord, and, concealed in the Old Testament, were manifested to the saints. And, on the other hand, there is "the riches of the glory of the mystery in the Gentiles," which is faith and hope in Christ; which in another place he has called the "foundation." — The Stromata Book 5 John Chrysostom : Let not others therefore deceive you, for they know not. Why to them alone? "To whom He was pleased," he saith. See how everywhere He stops the mouth of their questions. "To whom God was pleased to make known," he saith. Yet His will is not without reason. By way of making them accountable for grace, rather than allowing them to have high thoughts, as though it were of their own achieving, he said, "To whom he was pleased to make known." "What is the riches of the glory of this mystery among the Gentiles." He hath spoken loftily, and accumulated emphasis, seeking, out of his great earnestness, for amplification upon amplification. For this also is an amplification, the saying indefinitely, "The riches of the glory of this mystery among the Gentiles." For it is most of all apparent among the Gentiles, as he also says elsewhere, "And that the Gentiles might glorify God for His mercy." For the great glory of this mystery is apparent among others also, but much more among these. For, on a sudden, to have brought men more senseless than stones to the dignity of Angels, simply through bare words, and faith alone, without any laboriousness, is indeed glory and riches of mystery: just as if one were to take a dog, quite consumed with hunger and the mange, foul, and loathsome to see, and not so much as able to move, but lying cast out, and make him all at once into a man, and to display him upon the royal throne. They were wont to worship stones and the earth; but they learned that themselves are better both than the heaven and the sun, and that the whole world serveth them; they were captives and prisoners of the devil: on a sudden they are placed above his head, and lay commands on him and scourge him: from being captives and slaves to demons, they are become the body of The Master of the Angels and the Archangels; from not knowing even what God is, they are become all at once sharers even in God's throne. Wouldest thou see the countless steps they overleaped? First, they had to learn that stones are not gods; secondly, that they not only are not gods, but inferior even to men; thirdly, to brutes even; fourthly, to plants even; fifthly, they brought together the extremes: that not only stones but not earth even, nor animals, nor plants, nor man, nor heaven; or, to begin again, that not stones, not animals, not plants, not elements, not things above, not things below, not man, not demons, not Angels, not Archangels, not any of those Powers above, ought to be worshiped by the nature of man. Being drawn up, as it were, from some deep, they had to learn that the Lord of all, He is God, that Him alone is it right to worship; that the virtuous life is a good thing; that this present death is not death, nor this life, life; that the body is raised, that it becomes incorruptible, that it will ascend into heaven, that it obtains even immortality, that it standeth with Angels, that it is removed thither. But Him who was there below, having cleared at a bound all these steps, He has placed on high upon the throne, having made Him that was lower than the stones, higher in dominion than the Angels, and the Archangels, and the thrones, and the dominions. Truly "What is the riches of the glory of this mystery?" Just as if one should show a fool to be all at once made a philosopher; yea rather, whatsoever one should say, it would be as nothing: for even the words of Paul are undefined. "What is the riches," he saith, "of the glory of this mystery among the Gentiles, which is Christ in you?" Again, they had to learn that He who is above, and who ruleth Angels and dominions, and all the other Powers, came down below, and was made Man, and suffered countless things, and rose again, and was received up. All these things were of the mystery; and he sets them down together with lofty praise, saying, "Which is Christ in you?" But if He be in you, why seek ye Angels? "Of this mystery." For there are other mysteries besides. But this is really a mystery, which no one knew, which is marvelous, which is beside the common expectation, which was hid. "Which is Christ in you," he saith, "the hope of glory, whom we proclaim," bringing Him from above. — Homily on Colossians 5