Describing False Teachers

Through Peter's powerful word pictures, Christ warned us about the character of false teachers.
What are false teachers like?

1. As disappointing as a water-source that is dry. (v.17)
2. As stuck as a slave in chains. (v.18-19)
3. As endlessly filthy as a scavenger dog or a pig. (v.20-22)
   Applying: How can we identify a bad religious teacher?
   When does a person become worse off? Luke 11:24-26
   To whom is one a slave? Rom.6:16 John 8:34.
   How could a good teacher 'go bad'? Think Judas in Mark 6:12-13.