Oecumenius, on Rev 10:1

“And I saw another mighty angel come down from heaven, clothed with a cloud, and a rainbow was on his head, and his face was as the sun, and his feet as pillars of fire.”

“Moreover, John, the divine narrator in the present discourse, recounts the events that occurred when the sixth angel sounded his trumpet, which I have not yet fully explained all at once, since the fifth discourse is so long, I therefore did not reveal it in full. But what else does he write that has happened? Therefore, those who, while still alive, having heard or even seen the punishments inflicted upon the wrongdoers, did not repent, but remained wicked as previously stated, John says that I saw an angel descending from heaven, bringing images of punishments. He says that his vision and form were as follows: he was clothed with a cloud. The cloud symbolizes the eternal and invisible nature of the holy angels; for the cloud is a symbol of the unseen. The prophet, indicating the invisible nature of God, describes "clouds and thick darkness are round about him." (Ps. 97:2) And a rainbow was upon his head; as if the head and the foremost among the good angels were saying, it is brightness; for angels are beings of light. (2 Cor. 11:14) And his face is said to be like the sun; and this too is an appearance of pure brightness. But the rainbow is the brightness of a created nature, signifying virtue; therefore, the brightness of the rainbow is not uniform, but varied, indicating all the virtues of the angels. The sun, indeed, signifies their natural brilliance by a gleaming light. Therefore, it was surrounded by a rainbow, for virtues are around us; but its face resembled the sun, for in us all natural excellence is present in abundance. And his feet were like pillars of fire. The fire signifies the punishment that he came to bring upon the impious.”

Imported from an open dataset — not yet checked against the printed edition.