In the business world today, failure is apparently not an option. We need to change this attitude toward failure - and celebrate the idea that only by falling on our collective business faces do we learn enough to succeed down the road.

Once humans traded their hunter-gatherer existences for more settled communities, we began a quest to make our lives better and more comfortable, but we've also been sucking precious finite resources from our environment ever since.

I believe our legacy will be defined by the accomplishments and fearless nature by which our daughters and sons take on the global challenges we face. I also wonder if perhaps the most lasting expression of one's humility lies in our ability to foster and mentor our children.

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

Success is not how much money you have in a bank. Success is how many lives you have touched.

It's a simple fact: no individual can be good at everything. Everyone needs people around them who have complimentary sets of skills.

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.