The theme of the Book of Enoch dealing with the nature and deeds of the fallen angels so infuriated the later Church fathers that one, Filastrius, actually condemned it openly as heresy. Nor did the rabbis deign to give credence to the book's teaching about angels. Rabbi Simeon ben Jochai in the second century A.D. pronounced a curse upon those who believed it. So the book was denounced, banned, cursed, no doubt burned and shredded – and last but not least, lost (and conveniently forgotten) for a thousand years. But with an uncanny persistence, the Book of Enoch found its way back into circulation two centuries ago.
Christians once accepted the words of this Book of Enoch as authentic scripture, especially the part about the fallen angels and their prophesied judgment. In fact, many of the key concepts used by Jesus Christ himself seem directly connected to terms and ideas in the Book of Enoch.