DOUBLY DEAD
Jude 1.12"Doubly Dead." This is the one of some very rare verses in which Bible that teach us about Two different Deaths, about Physical Death and about Spiritual Death (the Death of the soul and the spirit). It is not a secret for anyone that people are dying by Physical Death since their creation, but it is a secret for many when people are dying also and by Spiritual Death.
The Death of the soul or of the spirit called by John as the Second Death (Revelation 21.8) which is the final, absolute, and ultimate Death of a human being or an angel. After this Second Spiritual Death there is not any sort or kind of life and no existence at all, life as it is ceased to exist forever without return.
SPEAK ARROGANTLY
Jude 1.16This passage of Jude recalls other passages of other Evangelists concerning this issue and it warning to the church about people who pretended to be the teachers of the Word but in reality, they have no adequate knowledge or understanding of the Word of GOD.
Such false teachers only confusing people with their "educated" and "bombastic" words, but do not give the true meaning and understanding of the Word of GOD.
Many of them teaching for monetary gain, "for the sake of gaining an advantage" as Jude pointed out here and have no love or compassion for the sheep of GOD, but only for their own wellbeing (John 10.11-13).
~ 16. *Speak arrogantly: (1Corinthians 1.17.19, 2.1) (2Peter 2.17-19) (Jude 1.16).
~ 11.16. *See also Teaching for monetary gain in: (Micah 3.11) (Acts 20.33-35) (John 10.1-12-13-16) (2Corinthians 2.17, 11.7-8) (1Timothy 3.3.8, 6.3-5) (Titus 1.10-11-16) (1Peter 5.2-4) (3John 1.7) (Jude 1.11.16).