Everything has a lifecycle. You have to believe it’s going to change.

The risk of failure is a very personal thing. One of the quotes I like, I think this came from the famous basketball coach from California - John Wooden - is that, "Successful people - winners - do everything necessary to prepare to win, without the certainty of winning." Everybody would do everything necessary to prepare to win if winning was a certainty. So you're willing to put yourself out publicly and privately and say, "I'm going to do this."

What makes you tick? Why do you care about the things you care about?

I think what I've tried to do is make the world a better place. I think that's what's really important. Nobody remembers who sold the most togas in Rome. In terms of legacy, people remember the great villains more than they remember the great heroes. So I think how you feel about yourself is the most significant question. What do you say about yourself when you put your head on the pillow? Are you really proud of what you're doing and the way you're doing it? I think it's really a fundamental question.

I think success is about purpose. People ask about success at different points in your life. As I look back, I think people that are successful feel good about what they are doing, and they can look back at what they've done and they feel good about it. People sometimes ask about success and they say, "What's your legacy?" and I say, "I think it's really a dumb question." I think the question is: What am I doing now? Do I feel good about myself? Am I proud of myself? Whatever purpose there is in life, I think success is about purpose. It's not about material things.

I don't think most analysts understand that whether I work a 70-hour week or an 80-hour week, I take my head with me when I go home.

I think leaders lead themselves, but leaders have ideas and maybe they're visionary ideas. Probably today, people would say Steve Jobs was a visionary because he invented this little gadget, the cell phone. But he didn't invent cell phones, and he didn't design the cell phone. He just took a couple of ideas and put them together, and no one else put those same ideas together as successfully as he did. But he had something that he was trying to do that intrigued him, and he could do it very well.