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 Malheur à eux! car ils ont suivi la voie de Caïn, ils se sont jetés pour un salaire dans l'égarement de Balaam, ils se sont perdus par la révolte de Koré.