In his short letter Jude warns the church against false teachers and  reminds us that all of Christian doctrine has already been given by the Apostles.

After a sharp rebuke of those who would teach false ideas in the church Jude goes on to show how believers can protect themselves against such men and their dangerous ideas.

Jude vs. 17-25

In the first part of his letter Jude describes the dangerous men and their tactics in spreading false doctrine.