If you want to be a great American, you have got to understand Ben Franklin, Thomas Jefferson, George Washington, how the American Revolution happened. I think if you want to be a good citizen of the digital age, it helps to feel comfortable with both the people and the ways of thinking that created the digital revolution.

Asked about the fact that Apple's iTunes software for Windows computers was extremely popular, Jobs joked, 'It's like giving a glass of ice water to somebody in hell.

If you want to live your life in a creative way, as an artist, you have to not look back too much. You have to be willing to take whatever you’ve done and whoever you were and throw them away. The more the outside world tries to reinforce an image of you, the harder it is to continue to be an artist, which is why a lot of times, artists have to say, “Bye. I have to go. I’m going crazy and I’m getting out of here.” And they go and hibernate somewhere. Maybe later they re-emerge a little differently. (Steve Jobs)

When there are multiple versions of a story, you really have three ways to go. You can pick the most sensational version. You can try to balance things in your gut to get to what you think is the honest truth. Or you can err on the side of kindness.

Leonardo da Vinci had such a playful curiosity. If you read his notebooks, you'll see he's curious about what the tongue of a woodpecker looks like, but also why the sky is blue, or how an emotion forms on somebody's lips. He understood the beauty of everything. I've admired Leonardo my whole life, both as a kid who loved engineering - he was one of the coolest engineers in history - and then as a college student, when I travelled to see his notebooks and paintings.

When you write biographies, whether it's about Ben Franklin or Einstein, you discover something amazing: They are human.

You and I love understanding American Revolution, but let's also understand the digital revolution, because that makes us more comfortable with our technology.