Don't be scared of the ‘what ifs,’ because the truth is, the only failure is not trying. That's the only way you can fail. Trying and having it not work out isn't failure.

I didn't see it then, but it turned out that getting fired from Apple was the best thing that could have ever happened to me. The heaviness of being successful was replaced by the lightness of being a beginner again, less sure about everything. It freed me to enter one of the most creative periods of my life.

My contemporaries were more upset about the Nobel than I was not to be recognised. One of them labelled it the 'No-Bell' prize! But it was fine by me. There's no Nobel Prize in astronomy and I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

When you’re working and you make mistakes, particularly when you’re young, you make discoveries because you do things that are inappropriate and wrongheaded, but within the wrongheadedness you find an unexpected way to go. These things are truly the breakthroughs.

I have a lot of respect and admiration for President Carter. It was a delight when I got the Nobel Peace Prize to get a letter from him. It meant a lot to me, getting that letter from a man who is my idol in many ways. ... He always has the courage to express his views, his convictions. He doesn’t hesitate to run against the current. He has always had a moral certitude. He looks at the ethics and morality of his action, and that’s key. Whatever we do in life, whether privately or publicly, we need to have a compass. We need to be sure that what we do is not only good for us, but good for the people at large. That’s ethics. That’s morality. I think we need to always know that our work is not just good for us in the short term, but it’s morally correct. And when I talk about morality, I don’t talk about religion. I talk about a moral code, a moral value, which I think we all have, being honest, being fair, being correct. These are values I think we all share.

First of all, you learn to manage stress. You learn to live with stress. I mean, stress is there all the time. There’s no question about it. It’s in the morning. It’s at night. It’s at 3:00 in the morning, but you need to learn how to manage stress. Sometimes it’s more difficult than others, but you try to distract yourself. Whenever I have the chance, I like to go and have a round of golf. I have a passion for modern art. I have a passion for antique carpets, classical music. To me, these are distractions, and sometimes my wife, she think I’m obsessed with these little things, but I tell her it is my way of distracting myself from just constantly continuing about my work. But the stress is there. But sometimes, the euphoria you get from a sense of achievement in many ways compensates all the stress you had for a year or two.

One of my mentors, Tom Frank, a professor of law at NYU, he was really instrumental in making me understand that we need to look at the global picture, and we always need to not take anything for granted, but go very much through a process of critical thinking before we formulate our views. So he was, I think, instrumental in shaping my views as to how to pursue my career in the future.

Well, many. I think Steinbeck, for example, was one of my favorites, Somerset Maugham, Hemingway. Quite a few.

For them, home is the world. For them, every human being is just one member of that large human family you have. ... if we have more children like mine, in my view, we will not have war.

No. Unfortunately, it hasn’t worked out quite that way. At that time, everybody was euphoric that we will have a new world order, you know, a world order that does not rely on nuclear weapons, nuclear deterrence. Unfortunately, it didn’t work that way. ... We still have thousands of warheads in existence. We still have more than 20 — 30 countries relying on nuclear deterrence for their own survival.