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.)

It’s how we are made as homo sapiens. We are biologically organized to cover distances on foot. That’s what we did for tens of thousands of years until we started to use horses, of course, until the mechanical age. And I would not call it “walking” because it’s not going out for a stroll or going out for a “power walk” or ambling in your city. It’s “traveling on foot.” You are reading the world, learning the essence of the world.

But I don’t want to repeat myself. And I realised that in America, the producer is the master of the film and the director is just a technician.

I don’t think of it as research. I read for interest and enjoyment, and when I cease to enjoy it I stop. I didn’t research quantum mechanics but I was fascinated by the mystery that lies in the foundation of the observable world, of which the most familiar example is the wave/particle duality of light. I thought it was a good metaphor for human personality. The language of espionage lends itself to this duality—think of the double agent.

I need to know what my editing voice is

I tried to get funding to shoot this film and couldn’t—nobody wanted to touch it, you know?

to isolate and to force myself to write

I like to get into a playful state of mind, in my home studio. To spend time tinkering and looking through stuff. I have a lot of objects in my life that inspire me, in general, like books, records, synthesizers, and cameras. I like to mess around with them and get into a headspace where I can say, “Okay, I’m going to make music for two hours, and then I’m going to write for two hours.” I’m excited to be in a place where that doesn’t have to be directed toward anything too specific, for the sake of doing it and seeing where I’m at right now.

I would say start off small, build from there.

My fear, my anxiety, that I’m grappling with in this film, is that if we’re not able to struggle with the domestic things