Of them the proverbs are true: "A dog returns to its vomit," and, "A sow that is washed goes back to her wallowing in the mud." 2 Peter 2:22
This is probably not a passage you want to read before or during breakfast. Admittedly, the first proverb quoted (Proverbs 26:11) is a bit graphic, but the truth is sound. The full proverb says, "As a dog returns to its vomit, so a fool repeats his folly." And, Peter continues, you can give a sow a good scrubbing and she will go right back to rolling around in the mud.
The point? Outward changes cannot alter the nature of the animal.
Peter applies this truth to false teachers. A false teacher is a seller of lies. And as a good salesman, he presents himself and his product well. His appearance is sharp. His presentation is engaging. His product comes in an attractive package. But even though he is cleaned up on the outside, his nature is to wallow in the mud of deception and manipulation.
The problem? Follow the false teacher and you'll go down with him.
Father, give us wisdom and discernment. Give us a desire to know the truth, and guard ourselves and those we love from error. In Jesus' name. Amen.