If you're smart, you often want a feedback loop so you know if what you've done is... is right.

I am surprised that in various countries, whether it's the U.K. or the U.S., you see isolationist tendencies that would tend to work against the co-operation, whether it's climate change, immigration, innovation, helping the very poorest. Those are things where you want to think across country boundaries and see a win-win-type solution.

Steve Jobs' ability to focus in on a few things that count, get people who get user interface right, and market things as revolutionary are amazing things.

I'm certainly well taken care of in terms of food and clothes ... Money has no utility to me beyond a certain point. Its utility is entirely in building an organization and getting the resources out to the poorest in the world.

A top-quartile teacher will increase the performance of their class - based on test scores - by over 10 percent in a single year. ... That means that if the entire U.S., for two years, had top-quartile teachers, the entire difference between us and Asia would go away.

Software is different than other products um, partly because it's, it's not physical and, and partly because of its complexity. You can express in software millions of different cases and making sure that you handle all of them correctly is extremely difficult.

In the same way that when the car got going, people thought it would be an electric car, people thought it would be a steam car.