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

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.

Every person I talk to has a story about how their smoke alarm went off or woke them up with a battery beeping. So you take it off the wall and you take the battery out and say screw this. They hate the products.

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

Google has the business resources, global scale and platform reach to accelerate Nest growth across hardware, software and services for the home globally.

It's easy to solve a problem that everyone sees, but it's hard to solve a problem that almost no one sees.

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.