A popular form of journalism is exposé, the unmasking of pretenders and the uncovering of behavior meant to be secret. The exposé appeals to people’s desire for the truth and for their public officials and institutions to be open to public scrutiny.
The Book of Jude is the New Testament’s exposé of false teachers who tried to infiltrate the body of Christ. Using graphic word pictures and recalling a rogue’s gallery of deceivers from the Old Testament, Jude documents a history of subversive forces that threatened to destroy Israel and would likewise harm the early church. Watch out, the letter warns, because “certain men have crept in unnoticed…ungodly men, who turn the grace of our God into lewdness and deny the only Lord God and our Lord Jesus Christ” (v. 4).
By blowing the whistle on such imposters, Jude makes sure that they will no longer go “unnoticed.” He doesn’t offer any advice on how to deal with the false teachers. He merely urges his readers to be alert and guard themselves by strengthening their own faith (vv. 20-22). The best protection against deception is to have a clear perception of God’s Word.