In Acts, Paul warns that wolves will rise up from within the church and that false teachers speaking perverse things will draw disciples after themselves. And you’ll notice that Paul doesn’t immediately give some simple rule to follow to make sure that we aren’t taken in by a wolf. Wolves are so very dangerous because they work to appear like a good shepherd. Jesus warns in Matthew that while they wear “sheep’s clothing”, inwardly they are ravenous wolves, and they want to devour you.