I was very, very thorough, making sure I really understood how that telescope worked, and that it was working properly. I was quite convinced that I wasn't clever enough to be in Cambridge and would be thrown out at some stage. My policy was to work as hard as I could so that I'd know I'd done my best. We now label this as impostor syndrome, but we didn't recognise, and certainly didn't name it, back then.

My most important rule is one that sums up the 10: if it sounds like writing, I rewrite it.

Well, it wasn’t a game to me. We were taught, interestingly enough, given the current state of political affairs, that you should try not to hate anyone, that hatred was a sickness and a weakness, and that there were very few people who were completely evil, so you should go out of your way to figure out what makes them tick and see if you can find some way to communicate with them. I learned that more with my family — even before I was old enough to know what I was doing —when I was eating meals, my grandmother’s brother and his family had — they had four kids, and they always fed a lot of people, and we ate there a lot, and they would talk about whatever had happened that week. And the kids could talk, but they had to prove they could listen first, so before I could tell a story I had to recount what I had just heard, because if you weren’t listening, nobody wanted to listen to you. And it was like a primer in human nature, and I was fortunate in having people all along the way who tried to help explain other people to me, and I developed an obsessive interest in doing it.

But I couldn’t let myself feel that way until it was all right to. And that’s part of the surgical mind too, addressing what you need to, and you know you can do, and postponing how you feel about it, thinking only of the patient and what you need to do.

I remember reading The Making of a Surgeon when I was in probably about the sixth or seventh grade. And that was a book that kind of got me focused, I think, on the career path. And I remember, one thing in there I still remember is that you can always tell you’ve really arrived as a surgeon when the nurses in the hospital ask you to be their physician.

If you want to do something, one of the smartest things that you can do is go find someone that’s done it and to try to get them to show you how they did it, to show you where the potholes are. What are the right steps to get there? ... And not just in terms of where to go to school, but what are the things that are really tough that you have to overcome, and how did you overcome it.