2 Peter 2:20-22

20People like that learned about our Lord Jesus Christ, who saves us. As a result, they had stopped doing the bad things that belong to this world. They had become free from the power of those things. But now they have started to do those bad things again. Those things have power over them and they cannot stop doing them. So now, these false teachers are worse than they were at the beginning, before they believed in the Lord Jesus.

21It would have been better for them if they had never known God's good way. But they did understand about the right things that God wants us to do. And then they turned away from that way of life. They stopped obeying God's good rules, that people had taught them.

22You know these true proverbs: ‘After a dog has been sick, it returns to eat it again.’ Also: ‘After you wash a pig, it will quickly roll in the dirt again.’ These words describe how the false teachers live.