We built the iPod in weeks. It had to be what I thought it was going to be because there wasnt time for endless refinements.

I'm always doubtful. Everything I do is always doubtful. When you're trying to differentiate, there's going to be this gut sense, is this right? If you're not having doubt, then you're not pushing it hard enough, or you're not looking at the details close enough. You need to be feeling that doubt every single day.

Usually, the biggest companies are not the most dynamic.

Learn by doing. Learn through experiences. And this goes back to Steve Jobs' thing - which is the way you open up your knowledge of the world is by discovering it and learning about it, not through books, but by being there.

Over the next ten years, everything that has a cord is going to have data in it.

I've been working with contractors designing and building a house on a nonstop basis since I learned about all these systems of audio, construction, electricity, energy, water systems.

Learning by doing is the only way I know how to learn.