Gregory the Great, on 1John 2:2

“And he is the propitiation for our sins: and not for ours only, but also for those of the whole world.”

“Hence also the two cherubim that cover the mercy seat look upon one another with their faces turned toward the mercy seat. For cherubim means "fullness of knowledge." And what is signified by the two cherubim except both Testaments? And what is figured by the mercy seat except the incarnate Lord? Of whom John says: "For he is the propitiation for our sins." And while the Old Testament proclaims that this was to be done which the New Testament declares was done concerning the Lord, it is as if both cherubim look upon one another, while they turn their faces toward the mercy seat, because while they see the incarnate Lord placed between them, they do not disagree in their view, for they narrate the mystery of his dispensation in harmony.”

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