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

Creativity comes from constraint.

Positive culture comes from being mindful, and respecting your coworkers, and being empathetic.

The reason I really started running was for meditative purposes. I would pick some problem to have in my head while running.

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

You have to have an emotional investment in what you're doing. If you don't love what you're doing, failure is pretty much guaranteed.

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.