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'd dropped out of college to start design thing.

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.

Have confidence in your ideas before they even exist.

I got an idea: people like news why don't we write the news down on a piece of paper, and we'll gas them up and drive them to everyone's house. I mean, if you were going to say that now, it doesn't sound like a great idea, because there are other ways you can distribute the news.

I think that's a really important role that people sometimes forget about, especially with all these newspaper shutting down and having trouble, where are all these stories going to go? I think you have something really great with all those stories waiting to be told, but I just don't know how it shapes up exactly. I don't think there are going to be a lot of newspaper reporters sitting around not writing.

A personal belief is that if you're not personally invested in what you're working on, you'll fail.