This is the case with the short epistle of Jude. Looking at this letter through modern eyes we are struck by a number of rare features. Perhaps the most obvious is the close similarity between Jude and 2 Peter. At first glance the parallel seems so close that we might wonder why Jude's letter was necessary at all. It seems almost to be a duplicate of a large section of Peter's material. Then there is Jude's near obsession with angels. Celestial spirits are of course, referred to elsewhere in the NT. But in this short letter of just 25 verses, there are at least four separate references to angelic beings, vv. 6,8,9,14. Why this preoccupation?.