what about this response? I got this on Yahoo! Answers:
[/i]1 Enoch is also quoted directly in the Epistle of Jude, and called a prophecy, but that's not in the Bible either.
Books like 1 Enoch and the books of Maccabees were in fact thought of and taught as scripture by some authorities. The Epistle of Barnabas, Shepherd of Hermas, and Apocalypse of Peter were considered part of the canon by the creator of the Codex Sinaiticus, but they later fell out of favor.
Really, it's largely based on the popularity of certain traditions, and "church politics." If different people had stronger influences, we would have a very different biblical canon. As it is, we inherited several particular man-made canons in the Protestant, Catholic, Eastern Orthodox, and Ethiopian churches, few of which agree with one another.