GLENN THRUSH: But, really, but you're not joking. That is a philosophy about —

SEC. CLINTON: Right.

GLENN THRUSH: — just sort of putting that out of your mind and going —

SEC. CLINTON: I find that very true for a lot of life — I really do — because, well, I'll give you just an example—

GLENN THRUSH: Yeah. Yeah.

SEC. CLINTON: — that just happened right now. I was thanking the band. I was taking a picture of the high school band —

GLENN THRUSH: Yeah.

SEC. CLINTON: — that played with us, and I was shaking their hands, and there was one young man whose head was just down. He looked so depressed, and I thought, "Wow, you know, I guess he doesn't want to shake my hand." Then he kind of lifted his head, and his teacher was standing there, and the teacher said: "Don't worry about it. It wasn't that big a mistake." And I could tell this kid was devastated.

GLENN THRUSH: Right.

SEC. CLINTON: I'm sure it was a mistake that nobody other than the music teacher or maybe some of the other kids would have noticed. So I looked at him and I said, "Don't worry about things, that you can do better next time. Don't worry about stuff you can't control," because it's been my observation that so many people worry about things that they are either ruminating over the past —

GLENN THRUSH: Mm-hmm.

SEC. CLINTON: —which doesn't help you get the focus and energy you need to get up every day and go forward, or they're worrying about stuff that they have absolutely no control over. So I have developed that kind of philosophy in my life over years.