Jude 1:13

He calls them "wandering stars." Heretics are like them not in the sense that they shine in the firmament of our faith and through them passes the Sun of righteousness, Christ, who brings virtues to maturity and gives life to the faithful devoted to them, …

Raging waves of the sea,....

Observe, It is a great reproach, though unjust and accidental, to religion, when those who profess it, and join in the most solemn institution of it, are in heart and life unsuitable and even contrary to it: These are spots. Yet how common in all Christian societies here on earth, the very best not excepted, are such blemishes!

Raging waves of the sea - Compare 2Pe 2:18. They are like the wild and restless waves of the ocean. The image here seems to be, that they were noisy and bold in their professions, and were as wild and ungovernable in their passions as the billows of the sea. Foaming out their own shame - The waves are lashed into foam, and break and dash on the shore. They seem to produce nothing but foam, and to proclaim their own shame, that after all their wild roaring and agitation they should effect no more.

Jude has in mind Isa 57:20. shame--plural in Greek, "shames" (compare Php 3:19). wandering stars--instead of moving on in a regular orbit, as lights to the world, bursting forth on the world like erratic comets, or rather, meteors of fire, with a strange glare, and then doomed to fall back again into the blackness of gloom.

Raging waves of the sea, foaming out their own shame - The same metaphor as in Isa 57:20: The wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt. These are like the sea in a storm, where the swells are like mountains; the breakers lash the shore, and sound like thunder; and the great deep, stirred up from its very bottom, rolls its muddy, putrid sediment, and deposits it upon the beach. Such were those proud and arrogant boasters, those headstrong, unruly, and ferocious men, who swept into their own vortex the souls of the simple, and left nothing behind them that was not indicative of their folly, their turbulence, and their impurity. Wandering stars - Αστερες πλανηται· Not what we call planets; for although these differ from what are called the fixed stars, which never change their place, while the planets have their revolution round the sun; yet, properly speaking, there is no irregularity in their motions: for their appearance of advancing, stationary, and retrograde, are only in reference to an observer on the earth, viewing them in different parts of their orbits; for as to themselves, they ever continue a steady course through all their revolutions. But these are uncertain, anomalous meteors, ignes fatui, wills-o’-the-wisp; dancing about in the darkness which themselves have formed, and leading simple souls astray, who have ceased to walk in the light, and have no other guides but those oscillating and devious meteors which, if you run after them, will flee before you, and if you run from them will follow you. The blackness of darkness - They are such as are going headlong into that outer darkness where there is wailing, and weeping, and gnashing of teeth. The whole of this description appears to have been borrowed from 2 Peter 2, where the reader is requested to see the notes.