I am kneeling because I have to do something. Anything. We all do.

I gained a humility that I needed in order to balance my audacity. I wanted to find the smartest people who would disagree with me to try to understand their perspective or to have them stress test my perspective. I wanted to make an idea meritocracy. In other words, not an autocracy in which I would lead and others would follow and not a democracy in which everybody's points of view were equally valued, but I wanted to have an idea meritocracy in which the best ideas would win out.

Finding gratitude and appreciation is key to resilience. People who take the time to list things they are grateful for are happier and healthier. It turns out that counting your blessings can actually increase your blessings. My New Year's resolution this year is to write down three moments of joy before I go to bed each night. This simple practice has changed my life. Because no matter what happens each day, I go to sleep thinking of something cheerful.

No big challenge has ever been solved and no lasting improvement has ever been achieved unless people dare to try something different. Dare to think different.

I am happy to sit in silence with my wife and I think that is a good sign – we are just happy being in each other’s company.

Professionally, when I lost my first Wimbledon final. I am also disappointed I didn’t learn Spanish when I lived there.

Driving home on my own, thinking about the last 18 months, which have been really difficult, and getting back to playing tennis again without any pain in my hip. It was happy crying.