I think Leonardo da Vinci teaches us the value of both being focused on things that fascinate us but also, at times, being distracted and deciding to pursue some shiny new idea that you happen to stumble upon. Balancing intense focus with being interested in a whole lot of different things is something that we have to do in the Internet age.

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.

One of the strongest motives that leads men to art and science is escape from everyday life with its painful crudity and hopeless dreariness. Such men make this cosmos and its construction the pivot of their emotional life, in order to find the peace and security which they cannot find in the narrow whirlpool of personal experience.

I've always had an abundance of material about the subjects of my biographies.

The best and most innovative products don't always win...(it's an) aesthetic flaw in how the universe worked

Politics is for the present, while our equations are for eternity.

Picasso had a saying - 'good artists copy, great artists steal' - and we have always been shameless about stealing great ideas.