Gregory the Dialogist : 8. For the heart hardens, like Egypt and Pharaoh, when one already understands the wounds of his sins through knowledge of sacred Scripture, and yet does not direct his mind toward the true joys of the future life through the improvement of his life or through the bitterness of repentance. Rightly, then, is he compared to the Egyptians in hardness of heart. For Egypt means "darkness." What then is understood by the name of Egypt, if not the multitude of angels who fell from the heavenly seats? And what is designated by Pharaoh, king of Egypt, if not the devil himself, the author of darkness? Rightly, then, are those who neglect repentance compared to Egypt and Pharaoh in the hardening of the heart. For the reprobate angels, once fallen from the heavenly places, just as they do not recover the love of their lost blessedness, so too they can never do penance for the pride they committed. Therefore, when the holy preachers attack the shameless sinners with sharp rebuke, they bring forward the likeness of Egypt and Pharaoh, so that their hearers may the more readily rush to make satisfaction, inasmuch as they recognize that by refusing to do penance, they are like the condemned angels. — Commentary on 1 Kings, Book 3, Chapter 4