Jude 1:3-4 - Jude's Purpose In Writing

3 Having made all haste to write to you about the common salvation, beloved, I had need to write to you to exhort you to contend earnestly for the faith once delivered to the saints. 4 For certain men crept in secretly, those having been of old previously written into this condemnation, ungodly ones perverting the grace of our God for unbridled lust, and denying the only Master, God, even our Lord Jesus Christ.