An invention has to make sense in the world it finishes in, not in the world it started.

Being too early is indistinguishable from being wrong.

The biggest mistake we see companies make when they first hit Twitter is to think about it as a channel to push out information.

Just do something that lights you up, and lights up your customers, and lights up the world and scale to that.

An invention has to make sense in the world it finishes in, not in the world it started.

The nice thing about twitter is the architecture of visibility. Email is invisible unless you reach out to someone directly. With Twitter, anyone can follow you and this is one of the big changes that was really introduced by Flickr, was this wonderful idea that you can follow somebody without their permission. Recognizing that relationships are asymmetrical, unlike facebook where we have to acknowledge each other otherwise we can’t see each other.

Early on, when software was developed by computer scientists, just people working with computers, people passed around software because that was how you got computers to do things.