 If a person's heart is closed, their mind is closed. They're not going to receive what's being said. It's like it's bouncing off a wall. And therefore, I'm going to say something that might sound kind of strange. But if someone's heart is closed, you actually can be wasting your time talking to them about Jesus. And it seems crazy to say that, but Jesus is well aware that can happen. That's why he says, if they're not listening, move on.