Even if you have constrained resources, don't cut corners. People will feel it.

If you're not having doubt, you're not pushing the boundaries far enough.

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.

There are a lot of designers who think they understand technology and a lot of technology guys who think they understand design. But to put them together and make it robust and repeatable for the mass market? It's an art.

The truth is, homes change over time — and technology has to adapt, not try to do everything at once.

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.

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.