I think Twitter is the future of communications and Square will be the payment network.

Making something simple is very difficult.

I was fascinated with jeans, because you can impress your life upon the jeans you wear. The way you sit imprints on the jeans.

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.

The first complaint we hear from everyone is: 'Why would I want to join this stupid useless thing and know what my brother's eating for lunch?' But that really misses the point because Twitter is fundamentally recipient-controlled - you choose to listen and you choose to leave. But you also choose what to put down and what to share.

The greatest lesson that I learned in all of this is that you have to start. Start now, start here, and start small. Keep it Simple.

What I love about New York is just the electricity I feel right away.