This message begins by looking at the danger of false teachings, moving on to show that true believers protect themselves, by staying within the bounds of the Gospel and show the truth of their faith by having a concern to reach out to people at all stages of life.

Jude 17-23 English Standard Version (ESV)
A Call to Persevere
17 But you must remember, beloved, the predictions of the apostles of our Lord Jesus Christ. 18 They[a] said to you, “In the last time there will be scoffers, following their own ungodly passions.” 19 It is these who cause divisions, worldly people, devoid of the Spirit. 20 But you, beloved, building yourselves up in your most holy faith and praying in the Holy Spirit, 21 keep yourselves in the love of God, waiting for the mercy of our Lord Jesus Christ that leads to eternal life. 22 And have mercy on those who doubt; 23 save others by snatching them out of the fire; to others show mercy with fear, hating even the garment[b] stained by the flesh.