Jude introduces himself as a bond-servant, or slave, of Jesus Christ and brother of James. He is writing to believers who are called by God and beloved in Him. Jude wishes them mercy, peace, and love multiplied. The document provides background on apostasy, beginning with a definition and examples from church history. It profiles Arius and the 4th century Arian heresy which denied the full deity of Christ. The teaching of the Jehovah's Witnesses is presented as a modern form of Arianism. The importance of contending for the faith against apostasy is discussed.