Great companies don't just have one founding moment. They have many founding moments.

'Luck' is recognizing when the situation encourages build out and execution.

As CEO, my main job is editor-in-chief.

Constraints inspire us in how we approach the press, how we approach business relationships, how we do everything.

The Web provides a very easy way to immediately grasp what's going on. It really offers the transparency, so you can see, especially with the search engine, how people are using Twitter at one glance. The phone doesn't allow for that.

It's really complex to make something simple.

Making something simple is very difficult.