"What is, in reality, the Book of Enoch, from which the author of Revelation and even St. John, the author of the fourth Gospel, so largely draw in their writings? It is simply a book of Initiation, which, in allegorical and cautious phraseology, presented the outline of certain archaic Mysteries that took place in the inner temples. The so-called "Visions" of Enoch concern his (Enoch's) experiences during initiation and what he had learned in the Mysteries."
January 1, 1970
https://en.wikiquote.org/wiki/Initiation_(theosophy)