I want to be able to express, I want to be able to communicate, and I want to be able to understand what it is I’m doing, and I want the people whose language it is to understand what I’m doing.

It’s easy to try to exaggerate the problems just to get more attention. So for me, it was very clear that the best way to deal with that was to do the best science that I was capable of doing.

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.)

I’m still astonished that somebody would offer me a job and pay me to do what I wanted to do. And to this day, that’s been the astonishment of my life, and delight of my life, and the wonder of my life, and the puzzlement that anybody would be so stupid as to be willing to do that. I hear all these success stories of people, these captains of industry, these forgers of the world, and empire builders and so on. And they talk about all the money they’ve made and become presidents and all that, and I thought, jeez, but look at me. When I was offered a chance to be head of studios I wouldn’t take it. I like to work with the tools of my trade. The tools of my trade is a lot of paper and a pencil, and that’s all it is.

“David, you are going to walk among kings.” This was my mum’s prophecy when I was small. My father is from a royal family in Nigeria, so I interpreted it that way. Remarkably, she was right: I went on to play King Pelasgus, Henry VI, Martin Luther King and Seretse Khama.

Right now. I am a very blessed man.

God has never let me down. He’s a key factor in guiding my decisions and feeling safe within them. My wife and I suffered three miscarriages, one of them quite late in the pregnancy. Without faith, we would have retreated into our own corners to lick our wounds, but our love increased.

Being a father teaches you very quickly that you are not the center of your own universe. That’s one of the gifts of having to wipe poop!