Athletes at all ages are bigger and stronger than ever before. And they are being encouraged - sometimes even incentivized, as we recently learned was the case on at least one National Football League team - to play to injure.

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.

Early versions of Microsoft Word left a lot to be desired. However, to the company's credit, it quickly learned where Word fell short, made the necessary changes, and repeatedly introduced new versions of the software.

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

My children have been learning lessons about entrepreneurship since they were in kindergarten, and these lessons are paying off: even though they are only 22, 18, and 15, they have already collectively launched three nonprofit organizations and several new businesses.

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 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.