At Twitter, mobile is in our DNA ... For us, it's all about mobile, and it always has been.

I started designing book jackets, which was great because I was good at it. And then from there I decided to become a freelance graphic designer and I needed to expand beyond book jackets, so I taught myself web design, and then in 1999 some friends of mine decided to start a company called Xanga.com, which was a very early kind of social network slash blogging community.

Creativity comes from constraint.

When you think about Twitter, there are people all around the world reporting twenty-four seven, every second. They're reporting what they're seeing and what's happening around them. So there's a lot of potential for breaking news.

I've probably overused this analogy of a flock of birds moving around an object in flight, but, in reality, it's so simple, real time communication of individuals that allow for this super organism type of organism to happen.

In any leadership position, you're always going to be disappointing somebody.

We can figure it out, it's not like we all have a disease.