Jude 1:3-4 - Jude's Purpose In Writing
3 Beloved, when I gave all diligence to write unto you concerning the common salvation, I held it necessary to write unto you, exhorting you to contend earnestly for the faith once delivered unto the saints. 4 For certain men have craftily introduced themselves, who were from of old proscribed for this condemnation, ungodly men, changing the grace of God into impurity, and denying our only sovereign God and Lord, Jesus Christ.