There is no map, and charting a path ahead will not be easy. We will need to invent, which means we will need to experiment.

But there's so much kludge, so much terrible stuff, we are at the 1908 Hurley washing machine stage with the Internet. That's where we are. We don't get our hair caught in it, but that's the level of primitiveness of where we are. We're in 1908.

Am I going to regret leaving Wall Street? No. Will I regret missing the beginning of the Internet? Yes.

If you are going to do large-scale invention, you have to be willing to do three things: You must be willing to fail; you have to be willing to think long term; and you have to be willing to be misunderstood for long periods of time.

Because, you know, resilience - if you think of it in terms of the Gold Rush, then you'd be pretty depressed right now because the last nugget of gold would be gone. But the good thing is, with innovation, there isn't a last nugget. Every new thing creates two new questions and two new opportunities.

If you don't understand the details of your business you are going to fail.

You want to look at what other companies are doing. It's very important not to be hermetically sealed. But you don't want to look at it as if, 'OK, we're going to copy that.' You want to look at it and say, 'That's very interesting. What can we be inspired to do as a result of that?' And then put your own unique twist on it.