7 Nothing then is more blessed than the apostles, and especially the three, who even in the cloud were counted worthy to be under the same roof with the Lord.
But if we will, we also shall behold Christ, not as they then on the mount, but in far greater brightness. For not thus shall He come hereafter. For whereas then, to spare His disciples, He discovered so much only of His brightness as they were able to bear; hereafter He shall come in the very glory of the Father, not with Moses and Elias only, but with the infinite host of the angels, with the archangels, with the cherubim, with those infinite tribes, not having a cloud over His head, but even heaven itself being folded up.
For as it is with the judges; when they judge publicly, the attendants drawing back the curtains show them to all; even so then likewise all men shall see Him sitting, and all the human race shall stand by, and He will make answers to them by Himself; and to some He will say, “Come, you blessed of my Father; for I was an hungered, and you gave me meat;” to others, “Well done, thou good and faithful servant, you have been faithful over a few things, I will set you over many things.”
And again passing an opposite sentence, to some He will answer, “Depart into the everlasting fire, that is prepared for the devil and his angels,” and to others, “O thou wicked and slothful servants.” And some He will “cut asunder,” and “deliver to the tormentors;” but others He will command to “be bound hand and foot, and cast into outer darkness.” And after the axe the furnace will follow; and all out of the net, that is cast away, will fall therein.
“Then shall the righteous shine forth as the sun;” or rather more than the sun. But so much is said, not because their light is to be so much and no more, but since we know no other star brighter than this, He chose by the known example to set forth the future brightness of the saints.
Since on the mount too, when He says, “He did shine as the sun,” for the same cause did He so speak. For that the comparison did not come up to His light, the apostles showed by falling down. For had the brightness not been unalloyed, but comparable to the sun; they would not have fallen, but would easily have borne it.
The righteous therefore will shine as the sun, and more than the sun in that time; but the sinners shall suffer all extremities. Then will there be no need of records, proofs, witnesses. For He who judges is Himself all, both witness, and proof, and judge. For He knows all things exactly; “For all things are naked and opened unto His eyes.”
No man will there appear rich or poor, mighty or weak, wise or unwise, bond or free; but these masks will be dashed in pieces, and the inquiry will be into their works only. For if in our courts, when any one is tried for usurpation, or murder, whatever he may be, whether governor, or consul, or what you will, all these dignities fleet away, and he that is convicted suffers the utmost penalty; much more will it be so there.
Source: Homilies on the Gospel of St. Matthew (New Advent)