2 Peter 2

http://www.esvbible.org/2+Peter+2/

Peter warns us about false teachers. They are nothing new, not even in the time of Jesus. They have always been around, and Peter assures us that God knows how to punish them on Judgement Day while saving His people. After all, He saved Noah and Noah's family while He wiped out the sinful people with the flood, and He saved Lot and Lot's family while He destroyed the cities of Sodom and Gomorrah, where the people lived their lives in sin. The false teachers are usually people who used to be in the faith but left because they decided they would rather pursue their own selfish interests. They may have even started out teaching the truth, but they changed in the hunger for fame or greed when they saw what their teachings could get them. Now, they work to exploit innocent believers and bring them into the false teachings, which they create themselves. Most of these people are new Christians and don't know any better. Peter says that it is worse to be in Christ and leave than it is to have never known the Way at all. It is true when the prophets said that a sow is cleaned and then returns to the mud. These false teachers were cleansed of their sins, but they chose to go back to how they lived in their sinful lives.