Jude Quotes Enoch

Jude quotes 1 Enoch, names Enoch as the speaker, and calls what he said a prophecy. It is the only place in the New Testament where a writer quotes a non-canonical book and names it.
People have drawn two opposite conclusions from that, and Heiser rejects both. Tertullian and Clement of Alexandria reasoned that if Jude quotes 1 Enoch, then 1 Enoch belongs in the canon. Others reasoned the reverse - if Jude quotes 1 Enoch, then Jude does not belong in the canon. Heiser calls these "equally poor reasoning," and he names the whole tangle bluntly as bizarre.
His own position is simpler than either: "A book doesn't have to be canonical to be useful."
Scripture links:
- Jude 14-15 - "Enoch, the seventh from Adam, prophesied about these, saying, 'Behold, the Lord comes with ten thousands of his holy ones.'"
- 1 Enoch 1:9 - The verse Jude is quoting, almost in its entirety.
Quoting a book is not canonising it. Paul quoted pagan poets. The question is what Jude was using it for.