2 Corinthians 3:18

Then, that you may not think that he is speaking of a time to come, he says, "But we all, with unveiled face, reflecting as a mirror the glory of the Lord." Not that which is brought to an end, but that which remaineth. "Are transformed into the same image from glory to glory, even as from the Lord the Spirit." Seest thou how again he places the Spirit in the rank of God, and raises them up to the rank of the Apostles. For he said before, "Ye are the Epistle of Christ; and here, "But we all with open face." Yet they came, like Moses, bringing a law. But like as we, he says, needed no veil, so neither ye who received it. And yet, this glory is far greater, for this is not of our countenance, but of the Spirit; but nevertheless ye are able as well as we to look steadfastly upon it. For they indeed could not even by a mediator, but ye even without a mediator can [look steadfastly on] a greater. They were not able to look upon that of Moses, ye even upon that of the Spirit. Now had the Spirit been at all inferior, He would not have set down these things as greater than those.

But what is, "we reflecting as a mirror the glory of the Lord, are transformed into the same image." This indeed was shown more clearly when the gifts of miracles were in operation; howbeit it is not even now difficult to see it, for one who hath believing eyes. For as soon as we are baptized, the soul beameth even more than the sun, being cleansed by the Spirit; and not only do we behold the glory of God, but from it also receive a sort of splendor. Just as if pure silver be turned towards the sun's rays, it will itself also shoot forth rays, not from its own natural property merely but also from the solar lustre; so also doth the soul being cleansed and made brighter than silver, receive a ray from the glory of the Spirit, and send it back. Wherefore also he saith, "Reflecting as a mirror we are transformed into the same image from glory," that of the Spirit, "to glory," our own, that which is generated in us; and that, of such sort, as one might expect from the Lord the Spirit. See how here also he calleth the Spirit, Lord.

This transformeth us. This suffereth not to be conformed to this world; for such is the creation of which This is the Author. For as he saith, "Created in Christ Jesus," so saith he, "Create in me a clean heart, O God, and renew a right spirit in my inward parts." Wilt thou that I show thee this also from the Apostles more obviously to the sense. Consider Paul, whose garments wrought: Peter, whose very shadows were mighty. For had they not borne a King's image and their radiancy been unapproachable, their garments and shadows had not wrought so mightily. For the garments of a king are terrible even to robbers. Wouldest thou see this beaming even through the body? "Looking steadfastly," said he, "upon the face of Stephen, they saw it as it had been the face of an angel." But this was nothing to the glory flashing within. For what Moses had upon his countenance, that did these carry about with them on their souls, yea 'rather' even far more. For that of Moses indeed was more obvious to the senses, but this was incorporeal.