Innovation is serendipity, so you don't know what people will make.

What we believe, endorse, agree with, and depend on is representable and, increasingly, represented on the Web. We all have to ensure that the society we build with the Web is the sort we intend.

If you use the original World Wide Web program, you never see a URL or have to deal with HTML. That was a surprise to me - that people were prepared to painstakingly write HTML.

Physicists analyse systems. Web scientists, however, can create the systems.

The original idea of the web was that it should be a collaborative space where you can communicate through sharing information.

I have built a moat around myself, along with ways over that moat so that people can ask questions.

The Google algorithm was a significant development. I've had thank-you emails from people whose lives have been saved by information on a medical website or who have found the love of their life on a dating website.