Jude 1:3-4 - Jude's Purpose In Writing
3 Beloved, giving all diligence to write to you concerning the common salvation, I was under a necessity to write and exhort you to contend earnestly for the faith once delivered to the saints. 4 For some men have come in by deception, who were of old appointed to this judgment, impious, changing the grace of our God into lewdness, and denying our only master and Lord, Jesus Christ.