(Proverbs 26:11 KJV) As a dog returneth to his vomit, so a fool returneth to his folly.
One thing I noticed when we had a dog was that her behavior changed as she grew older. When she was a pup we used to call her to clean up what the cat had left. She did so with gusto. When she got older she would look at us like we were the fools.
She was still a dog. She still sniffed and licked things that I would not even want to touch. She still barked at things no one else heard. But she stopped enjoying vomit. Why? I don’t know, but it happened.
So? She was still a dog. Some people will always be fools. Maybe they can still learn in spite of that. Maybe we should be alert but keep trying. Maybe. Maybe not.