 Thinking, here's another one that a lot of people say, oh, behaviors just don't deal with thinking. Oh, hogwash, we deal just fine with thinking. It's just that no one else can observe your thinking. But there's been lots of research on thinking, and we study it fairly well. It's not perfect research, but that's just because it's hard to study. You have to trust a lot of self-report things. So let's look at some of this respondent conditioning and how that happens in terms of thinking. Your book goes through the great example of the condition-seeing stuff, right? So go through the exercises in the book. Sit there and try to imagine something that you haven't experienced in five years or 10 years or something like that. Think back to something you experienced as a kid. You can see that in your head, right? You can see that experience. You can see that beach. You can see that car. You can see that person, whatever it may be, right? But seeing is a reaction or a response, a condition response to a particular word or to another stimulus. So if I say, imagine your favorite car from a childhood or imagine your favorite person from childhood, okay? So imagining your favorite person, there's the condition stimulus, favorite person, that produces an image in your head, a condition response. And you actually see that person, right? And what's really interesting here is when you start to look at the biology, when you look at that imaging stuff, the functional, the FMRI imaging, right? The same section of the brain lights up when you're imagining seeing someone versus when you're actually seeing that same person. So it really is like you're seeing that person and that's what classical conditioning really does. And that's how this is happening on that private level. Operant conditioning, same type of thing, self-talk, right? So if you're talking out loud to yourself, kind of like I'm doing now, right? And if someone walked by here and they had no idea that I was recording stuff, they would think I'm like flat out crazy. I sit here and I talk fairly loud in my office and people on the other side of the walls here can hear me. They may think I'm just nuts, right? And they may even say that, they may bang on the door and say, holy God, this man is crazy. You might want to shut up, right? So only crazy people talk to themselves. I'm being punished, okay? If I'm talking out loud to myself, but if I talk quietly, privately to myself, I don't verbalize anything. My ears don't pick up on anything. Then that might be reinforced, right? So I can work through a particular problem silently. I can read to myself silently. I'm avoiding external punishment. Anytime you're avoiding something, you're getting reinforced for whatever behavior you're doing. So thinking to myself or talking privately to myself is reinforced by not being punished, by avoiding that averse of stimuli that may happen if you do talk to yourself, right? So the thinking and feeling and all those things, those are just as describable in terms of classical and operant conditioning as any of the other behaviors that we've been talking about. Hope that helps shed a little bit of light on what's going on with these couple of chapters and a little bit about what's going on with regard to our private events, our private behavior. So talk to you soon.