I feel that because I challenge myself so often, sometimes I will fail. This is, to me, the essence of competition — that there will be both winners and losers. But I have great faith in myself that I will turn this loss into something positive.

When we started Airbnb, no one wanted to invest. I felt like a failure so many days. It was small, it wasn't growing... A sane person probably would have quit. But we kept going through obscurity, through rejection. We couldn't raise money — but over time, it started growing.

The world would say it was failure. But the difference was so small between us. They played great, but they lost.

But after one year of medical school I fled. I realized I would be a very unhappy doctor and I really did not want to be responsible for the inadvertent death of my patients. Leaving medical school was a very unusual decision, especially in Nigeria where it is very difficult to get into medical school. Later, people told me that it had been very courageous of me, but I did not feel courageous at all. What I felt then was not courage but a desire to make an effort. To try.

As a great man.

To the people who, because of my career, I cannot spend time with. I have to be selfish, unfortunately.

I was on a cliff in Dartmoor, doing a Royal Marine abseil. I fell upside down and thought, “I’m going to die here.”

I'm tired, I'm not myself and I'm not enjoying the sport as I have done for the last decade. Some might recognise it as burnout; I just know that over the last few years I haven't had the answers.

The realisation that I am not the best version of myself.