14 About these also Enoch, the seventh from Adam, prophesied, saying, “Behold, the Lord came with ten thousands of his holy ones
Jude is not promoting the Book of Enoch just because he quoted it. He is pointing to the reality of Jesus’ second coming and our being ready. Quoting from another source does not make it inspired, but he extracts with what it agrees with the Scriptures and shows its reality to make his case stronger. Plus, at his time, his readers were familiar with the Book of Enoch.
The reason the Book of Enoch is not inspired is that Jesus and His disciples never quoted from it and it is not mentioned anywhere in the old Testament.
Paul quoted from a Cretans prophet to show what he was saying about the Cretans was correct, however, it didn’t make the prophet’s words Scripture. Today, we can quote or paraphrase from someone that is in agreement with the Bible or if it’s an actual fact to make our point. Our final authority rest solely on the Word of God, anything that contradicts it must be rejected.
Spiritual Minefield 