The thing that excites me, and the thing that excited me about Twitter, is the idea of a flock of birds moving around an object in flight.

For me, I've learned about what it means to focus on a culture, to build social responsibility, and the idea of a company as a super-organism.

Once true passion hits you, you can recognize all the times in your life you were chasing the wrong dream. And after you've experienced that sustained fulfillment, you'll never want to settle for anything less.

I'm still kinda old-school. We're twittering, and we're all twitterers. And we write tweets. The only thing I don't love is twits.

I thought about tennis. But the more I thought about the whole thing - lessons, equipment, going to the courts - I said screw it, I'm just going to go buy a pair of sneakers and go running.

This idea that the open exchange of information can have a positive global impact is being proven over and over again around the world nearly on a daily basis - and for Secretary Clinton to recognize that, I think, is a huge step.