Jude 1:3-4 - Jude's Purpose In Writing
3 Dear friends, while I was making every effort to write to you about our common Salvation, I felt that I must write to you at once to urge you to fight in defense of the Faith that has once for all been entrusted to the keeping of Christ's People. 4 For there have crept in among you certain godless people, whose sentence has long since been pronounced, and who make the mercy of God an excuse for profligacy, and disown our only lord and master, Jesus Christ.