Gregory the Great, on Exod 12:9

“You shall not eat thereof any thing raw, nor boiled in water, but only roasted at the fire: you shall eat the head with the feet and entrails thereof.”

“Where it is also added: "You shall not eat any of it raw, nor cooked in water." Behold, now the very words of the history drive us from a historical understanding. Surely, dearest brothers, that Israelite people established in Egypt had not been accustomed to eat raw lamb, that the law should say to them: "You shall not eat any of it raw"? Where it is also added: "Nor cooked in water." But what does water signify except human knowledge, according to what is said by Solomon in the voice of heretics: "Stolen waters are sweeter." What do the raw flesh of the Lamb signify except His humanity considered without reflection and left without reverence of thought? For everything that we consider carefully we, as it were, cook with the mind. But the flesh of the lamb is neither to be eaten raw nor cooked in water, because our Redeemer is neither to be considered a mere man, nor is how God was able to become incarnate to be thought through by human wisdom. For everyone who believes our Redeemer to be a mere man, what else does he do but eat the raw flesh of the lamb, which he was unwilling to cook through understanding of His divinity? And everyone who attempts to examine the mysteries of His incarnation according to human wisdom wishes to cook the flesh of the lamb in water, that is, he wishes to penetrate the mystery of His dispensation through dissolute knowledge. Therefore, whoever desires to celebrate the solemnity of Paschal joy, let him neither cook the lamb in water nor eat it raw, so that he may neither seek to penetrate through human wisdom the depth of His incarnation, nor believe in Him as in a mere man; but let him eat the flesh roasted by fire, so that he may know that all things were dispensed through the power of the Holy Spirit.”

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