Learn about The book of Enoch, or, 1 Enoch – R. H. Charles (1912) :
The Book of Enoch is for the history of theological development the most important pseudepigraph of the first two centuries B.C. Some of its authors—and there were many—belonged to the true succession of the prophets, and it was simply owing to the evil character of the period, in which their lot was cast, that these enthusiasts and mystics, exhibiting on occasions the inspiration of the O.T. prophets, were obliged to issue their works under the aegis of some ancient name. The Law which claimed to be the highest and final word from God could tolerate no fresh message from God, and so, when men were moved by the Spirit of God to make known their visions relating to the past, the present, and the future, and to proclaim the higher ethical truths they had won, they could not do so openly, but were forced to resort to pseudonymous publication.
To describe in short compass the Book of Enoch is impossible. It comes from many writers and almost as many periods. It touches upon every subject that could have arisen in the ancient schools of the prophets, but naturally it deals with these subjects in an advanced stage of development. Nearly every religious idea appears in a variety of forms, and, if these are studied in relation to their contexts and dates, we cannot fail to observe that in the age to which the Enoch literature belongs there is movement everywhere, and nowhere dogmatic fixity and finality. And though at times the movement may be reactionary, yet the general trend is onward and upward. In fact the history of the development of the higher theology during the two centuries before the Christian era could not be written without the Book of Enoch.