Charles Spurgeon Commentary Jude 1:6

"And angels that kept not their own principality, but left their proper habitation, he hath kept in everlasting bonds under darkness unto the judgment of the great day." — Jude 1:6 (ASV)

And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.

The angels think of how high they stood in their first estate. If sin could drag an angel from the skies, it may well pluck a minister from the pulpit, a deacon from the communion table, a church member out of the midst of their fellow believers. It is only perseverance in holiness which is the sign of eternal salvation; if we forsake the Lord, and turn back to our former evil ways, it will be the evidence that we never really believed in Christ, and that there was no true work of grace in our hearts.

And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.

See, then, the need for stability, the need for abiding in the faith and abiding in its practice, lest we turn out to be like the Israelites, who, though they came out of Egypt, left their carcasses in the wilderness, or like the angels, who, though they once stood in God's presence in glory, have fallen to the depths of the abyss because of their apostasy.