As a young boy growing up in rural India, most of what I knew of the world was what I could see around me. But each night, I would look at the Moon - it was impossibly far away, yet it held a special attraction because it allowed me to dream beyond my village and country, and think about the rest of the world and space.

Humans have always used our intelligence and creativity to improve our existence. After all, we invented the wheel, discovered how to make fire, invented the printing press and found a vaccine for polio.

I believe that entrepreneurs play an unmatched role and the accelerating pace of innovation is transforming the face of global challenges. You must think about the solution differently when you're trying to impact 1 billion people rather than affecting 1 million people.

It's really easy to create a $1 billion company - you just have to solve a $10 billion problem.

I have seen humility in many of the finest leaders I have met the world over. And indeed, it is embodied in the warm, engaging and quintessentially successful spirit of Sir Richard Branson.

Education should not be about building more schools and maintaining a system that dates back to the industrial revolution. We can achieve so much more, at unmatched scale with software and interactive learning.

Every day you spend becoming an expert in a field, you become more useless in that field.