Adam Clarke on Jude 1:16

These are murmurers - Grudging and grumbling at all men, and at all things; complainers, μεμψιμοιροι, complainers of their fate or destiny - finding fault with God and all his providential dispensations, making and governing worlds in their own way; persons whom neither God nor man can please.

Walking after their own lusts - Taking their wild, disorderly, and impure passions for the rule of their conduct, and not the writings of the prophets and apostles.

Great swelling words - Ὑπερογκα. See the explanation of this term in 2Pet 2:18.

Having men's persons in admiration - Time-servers and flatterers; persons who pretend to be astonished at the greatness, goodness, sagacity, learning, wisdom; etc., of rich and great men, hoping thereby to acquire money, influence, power, friends, and the like.

Because of advantage - Ωφελειας χαριν· For the sake of lucre. All the flatterers of the rich are of this kind; and especially those who profess to be ministers of the Gospel, and who, for the sake of a more advantageous settlement or living, will soothe the rich even in their sins. With such persons a rich man is every thing; and if he have but a grain of grace, his piety is extolled to the skies! I have known several ministers of this character, and wish them all to read the sixteenth verse of Jude.