Of the fall of the devil and the angels.
And so we are clearly shown that out of that number of them some of the leaders fell, by the lamentations of Ezekiel and Isaiah, in which we know that the prince of Tyre or that Lucifer who rose in the morning is lamented with a doleful plaint: and of him the Lord speaks as follows to Ezekiel: “Son of man, take up a lamentation over the prince of Tyre, and say to him: Thus saith the Lord God: Thou wast the seal of resemblance, full of wisdom, perfect in beauty. Thou wast in the pleasures of the paradise of God: every precious stone was thy covering: the sardius, the topaz and the jasper, the chrysolyte and the onyx and the beryl, the sapphire and the carbuncle and the emerald: gold the work of thy beauty, and thy pipes were prepared in the day that thou wast created. Thou wast a cherub stretched out and protecting, and I set thee in the holy mountain of God, thou hast walked in the midst of the stones of fire. Thou wast perfect in thy ways from the day of thy creation, until iniquity was found in thee. By the multitude of thy merchandise thy inner parts were filled with iniquity and thou hast sinned; and I cast thee out from the mountain of God, and destroyed thee, O covering cherub, out of the midst of the stones of fire. And thy heart was lifted up with thy beauty: thou hast lost thy wisdom in thy beauty, I have cast thee to the ground: I have set thee before the face of kings, that they might behold thee. Thou hast defiled thy sanctuaries by the multitude of thy iniquities and by the iniquity of thy traffic.” 1530 Isaiah also says of another: “How art thou fallen from heaven, O Lucifer, who didst rise in the morning? how art thou fallen to the ground, that didst wound the nations? and thou saidst in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God, I will sit in the mountain of the covenant, in the sides of the north. I will ascend above the heights of the clouds. I will be like the Most High.” 1531 But Holy Scripture relates that these fell not alone from that summit of their station in bliss, as it tells us that the dragon dragged down together with himself the third part of the stars. 1532 One of the Apostles too says still more plainly: “But the angels who kept not their first estate, but left their own dwelling, He hath reserved in everlasting chains under darkness to the judgment of the great day.” 1533 This too which is said to us: “But ye shall die like men and fall like one of the princes,” 1534 what does it imply but that many princes have fallen? And by these testimonies we can gather the reason for this diversity; viz., either that they still retain those differences of rank (which adverse powers are said to possess, after the manner of holy and heavenly virtues) from the station of their former rank in which they were severally created, or else that, though themselves cast down from heavenly places, yet, as a reward for that wickedness of theirs in which they have graduated in evil, they claim in perversity these grades and titles of rank among themselves, by way of copying those virtues which have stood firm there.
Ezek. xxviii. 11-18.378:1531
Is. xiv. 12-14.378:1532
Cf. Rev. xii. 4.378:1533