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

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.

There's no such thing as a superhero, but together we can world in a new direction.

I don't think of Twitter as a social network. I think of it as a messaging system that has a lot of social components to it.

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

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.

If you make the opportunity. you'll be the first in the position to take advantage of it.