Any lasting relationship needs non-negotiables. We made the decision early on never to be apart for longer than two weeks: 26 years married and we’ve only broken that rule once, by 11 hours, when my wife was in Sleepy Hollow. If I ever meet [director] Tim Burton, I’ll be having words.

These tics do bother me. Could I play a match without them? Yes, without some of them. I don't have to touch my nose or put my hair behind my ears before I serve. That's possible to stop. Not putting the bottles in front of my chair, I could go without that, too. But adjusting my underwear, that I could never get rid of. It's impossible.

There are some things about being president that I still have difficulty doing. … For example, faking emotion. Because I feel it is an insult to the people I'm dealing with. For me to feign outrage, for example, feels to me like I'm not taking the American people seriously. I'm absolutely positive that I'm serving the American people better if I'm maintaining my authenticity. And that's an overused word. And these days people practice being authentic. But I'm at my best when I believe what I am saying.

Charlie and I decided long ago that in an investment lifetime it's just too hard to make hundreds of smart decisions. That judgment became ever more compelling as Berkshire's capital mushroomed and the universe of investments that could significantly affect our results shrank dramatically. Therefore, we adopted a strategy that required our being smart - and not too smart at that - only a very few times. Indeed, we'll now settle for one good idea a year. (Charlie says it's my turn.)

My mother said — and I didn’t realize how well it works — when I’d bring a drawing to her, she said, “I don’t look at the drawing. I looked at the child, and if the child was excited, I got excited.” And then we could discuss it. Because we were bringing something that meant something to me as a child. And so she would join in my lassitude, or my excitement, or my frustration. She wasn’t a psychologist, but she did understand this simple matter. Also, it accomplishes the only thing that has any meaning to a little child. The only thing an adult can give a child is time. That’s all, there isn’t anything else. That’s the only thing they need, really, is time. If you give them time, you’ll have to be understanding of them and give them time.