Most important, you must know that no prophecy of scripture represents the prophet’s own understanding of things, because no prophecy ever came by human will. Instead, men and women led by the Holy Spirit spoke from God.
But false prophets also arose among the people. In the same way, false teachers will come among you. They will introduce destructive opinions and deny the master who bought them, bringing quick destruction on themselves. Many will follow them in their unrestrained immorality, and because of these false teachers the way of truth will be slandered. In their greed they will take advantage of you with lies. The judgment pronounced against them long ago hasn’t fallen idle, nor is their destruction sleeping.
2 Peter 1:20-2 Peter 2:3, Common English Bible TranslationI read these verses today and thought about Joseph Smith. I consider him to be a false prophet. You can read about how his own "prophecies" failed. You can find out about his "unrestrained immorality." You can read how he "introduced destructive opinions."
In his "translation" of the Bible, Joseph made it seem that he himself was mentioned in Biblical prophecies. It's with a bitter smile I see that indeed someone prophesied of Joseph--as a warning to us in the latter days.