Gregory the Great, on Ezek 1:4

“And I saw, and behold a whirlwind came out of the north: and a great cloud, and a fire infolding it, and brightness was about it: and out of the midst thereof, that is, out of the midst of the fire, as it were the resemblance of amber:”

“And so this fire of malice which burned from the hearts of the Jews in persecution, before it would afflict the holy apostles by raging against them, exercised itself upon the very author and redeemer of the human race. Whence it is also added: "And from its midst as it were the appearance of electrum," that is, from the midst of the fire. What is designated by the appearance of electrum, except Christ Jesus, the Mediator of God and men? For electrum is made from gold and silver. In electrum, when gold and silver are mixed, the silver increases in brightness, while the gold grows pale from its own brilliance. The one advances toward brightness, the other is tempered from brightness. Therefore, since in the only-begotten Son of God our nature was united to the nature of divinity, in which union humanity grew into the glory of majesty, while divinity tempered itself from the power of its brilliance to human eyes—through the fact that human nature was made brighter, as it were the silver increased through the gold. And because divinity was tempered from its brilliance to our sight, as it were the gold grew pale to us through the silver. For that immutable nature, which remaining in itself renews all things, if it had wished to appear to us as it is, would have burned us with its brilliance rather than renewed us. But God tempered the brightness of his greatness to our eyes, so that while his brightness is tempered for us, even our weakness might become bright in his light through likeness to him, and through grace received might change, so to speak, the color of its condition. Therefore, like electrum in fire is God made man in persecution.”

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