Jude 1:6

“And the angels which kept not their first estate, etc.] Or “principality”; that holy, honourable, and happy condition, in which they were created; for they were created in perfect holiness and righteousness, stood in the relation of sons to God, and were, for the lustre of their nature, comparable to the morning stars; they were among the thrones, dominions, principalities, and powers; were a superior rank of creatures to men, and who beheld the face, and enjoyed the presence of God; but this estate they kept not, for being mutable creatures, one of them first sinning, the rest were drawn into it by him, and so were not what they were before, nor in the same estate, or place: but left their…”

“(Pe2 2:4.) kept not their first estate--Vulgate translates, "their own principality," which the fact of angels being elsewhere called "principalities," favors: "their own" implies that, instead of being content with the dignity once for all assigned to them under the Son of God, they aspired higher. ALFORD thinks the narrative in Gen 6:2 is alluded to, not the fall of the devil and his angels, as he thinks "giving themselves over to fornication" (Jde 1:7) proves; compare Greek, "in like manner to these," namely, to the angels (Jde 1:6). It seems to me more natural to take "sons of God" (Gen 6:2) of the Sethites, than of angels, who, as "spirits," do not seem capable of carnal connection. The…”

“And the angels which kept not their first estate - A second case denoting that the wicked would be punished. Compare the notes, 2 Peter 2:4. The word rendered “estate” (ἀρχὴν archēn) is, in the margin, “principality.” The word properly means, “beginning, commencement;” and then that which surpasses others, which is “first,” etc., in point of rank and honor; or pre-eminence, priority, precedence, princedom. Here it refers to the rank and dignity which the angels had in heaven. That rank or pre-eminence they did not keep, but fell from it. On the word used here, compare Ephesians 1:2; Ephesians 3:10; Colossians 2:10, as applied to angels; 1 Corinthians 15:24; Ephesians 6:12; Colossians…”

“And the angels, who kept not their first dignity - Once assigned them under the Son of God. But voluntarily left their own habitation - Then properly their own, by the free gift of God. He reserved - Delivered to be kept. In everlasting chains under darkness - O how unlike their own habitation! When these fallen angels came out of the hands of God, they were holy; else God made that which was evil: and being holy, they were beloved of God; else he hated the image of his own spotless purity. But now he loves them no more; they are doomed to endless destruction. (for if he loved them still, he would love what is sinful:) and both his former love, and his present righteous and eternal…”

“1:6 The angels might refer to the fall of Satan and his angelic followers, but no Old Testament passage clearly describes this event (see study notes on Isa 14:12-17; Ezek 28:12-19). Jude was probably referring to Gen 6:1-4; Jewish tradition understood the “sons of God” in Gen 6 to be wicked angels and viewed their intercourse with women as the cause of their judgment (see 1 Enoch 6–10; see also study notes on 1 Pet 3:19-20; 2 Pet 2:4). Jude later (Jude 1:14-15) quotes directly from 1 Enoch.”

“angels: Joh 8:44 first estate: or, principality, Eph 6:12 he hath: Mat 25:41; Pe2 2:4 unto: Mat 8:29; Heb 10:27; Rev 20:10 Jude 1:7”