The book of Jude was written to call Christian believers to action, the action of contending for the faith once for all delivered. Jude wanted believers to realise that they must take certain steps in order to ensure that the faith is not changed or edited. Your sermon will explain why we must be on our guard against false teaching and not taken in by those who seek to change the faith. There are likely to be lots of reasons why we find false teaching attractive, but we must remember that it leads to sin, results in judgment, and comes from those who do not have the Spirit.
11 Woe to them! For they walked in the way of Cain and abandoned themselves for the sake of gain to Balaam’s error and perished in Korah’s rebellion.