Gregory the Great, on Ezek 1:11

“And their faces, and their wings were stretched upward: two wings of every one were joined, and two covered their bodies:”

“It had been said: "And their faces and their wings were stretched out above," and immediately what we have brought forward was added, that "two wings of each were joined." Here it is openly understood that they were both stretched out above and joined, while two covered their bodies. But what are the wings of the animals called except pinions? In this matter we must inquire with diligent investigation what the four wings of the saints are, of which two stretched out above are joined, while two cover their bodies. For if we look attentively, we find there are four virtues that lift every winged creature from earthly actions: namely, love and hope concerning future things, but fear and penitence concerning past things. Therefore the wings joined to each other are stretched out above, because love and hope lift the mind of the saints to things above. These are also fittingly called joined, because the elect without doubt both love the heavenly things they hope for and hope for what they love. But two cover their bodies, because fear and penitence hide their past evils from the eyes of almighty God. Thus two wings, as was said, are joined above, when love and hope elevate the hearts of the elect to higher things, suspend them toward heavenly things. But two wings cover their bodies, when fear and penitence hide their past evils from the sight of the eternal judge. For in that they remember that they have sinned, because they fear greatly and weep, what else do they do but cover their body? They who hide their carnal deeds from the strict examination by good works placed over them. For it is written: "Blessed are they whose iniquities are forgiven, and whose sins are covered." For we cover sins when we place good deeds over evil actions. For everything that is covered is placed beneath; and that by which it is covered is drawn over it from above. Therefore when we renounce the evils we have done and choose the good things we should do, we as it were draw a covering over that thing which we are ashamed to have seen.”

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