What does Jude 1:13 mean?
In this passage, Jude has been describing how false teachers are rejecting the truth in favor of their own sins. As a result, they are like "hidden reefs" which threaten to damage the spiritual lives of those around them (Jude 1:12).In this verse, Jude compares the false teachers to wild waves of the sea that carry froth to the shore. The false teachers' words were frothy and shameful. Jude's indictment echoes Isaiah's description of the wicked as "like the tossing sea…its waters toss up mire and dirt" (Isaiah 57:20).
Jude also pictures the false teachers as shooting stars. They give only flickering light as they wander trackless and momentarily across the sky. The deepest darkness—everlasting punishment—is reserved for them. This statement, in particular, emphasizes that Jude views these false teachers as lost; they are not merely confused believers. They do not, in fact, have a saving faith in Christ.