I was a kind of hyper-intense person in my twenties and very impatient.

The billion people who wake up every day trying to figure out if they have enough food to eat won't be at Davos.

All lives have equal value. And so you say, 'why do poor children die when other children don't? Why do some people have enough nutrition or reasonable toilets and other people don't?' So those basic needs that, through innovation, actually it's very affordable to bring them...to everyone.

Any version of Windows is going to have lots of great new things that people use and things that are tough.

We're responsible for the creation of the PC industry. The whole idea of compatible machines and lots of software - that's something we brought to computing. And so it's a responsibility for us to make sure that things like security don't get in the way of that dream.

The need to communicate effectively with your customers will come up again and again.

Bitcoin is a technological tour de force