Who Was Jude?
Jude was a brother of James and one of the “brethren of the Lord” (see Bible Dictionary, “Jude,” p. 719). He knew the Old Testament well and used stories and examples from it to teach valuable lessons.
Jude was concerned about the dangers of apostasy, which was subtly growing among those to whom he wrote. Some were unaware of the dangerous cancer of false doctrines that were being taught.