When I studied graphic design, I learned a valuable lesson: There's no perfect answer to the puzzle, and creativity is a renewable resource.

I thought I was going to stay at Google, because it was a great place to work.

I think we definitely want to focus on the simplicity aspect because it's something that's built into the culture even here at Twitter. Constraints inspire creativity.

Constraint inspires creativity

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.

I started out as an artist, and I continue to think of myself as an artist first, and a technologist and entrepreneur after that.