I'm an optimist in the sense that I believe humans are noble and honorable, and some of them are really smart. I have a very optimistic view of individuals.

We just wanted to build the best thing we could build

The people who built Silicon Valley were engineers. They learned business, they learned a lot of different things, but they had a real belief that humans, if they worked hard with other creative, smart people, could solve most of humankind's problems. I believe that very much.

At Apple, people are putting in 18-hour days. We attract a different type of person—a person who doesn’t want to wait five or ten years to have someone take a giant risk on him or her. Someone who really wants to get in a little over his head and make a little dent in the universe. We are aware that we are doing something significant. We’re here at the beginning of it and we’re able to shape how it goes. Everyone here has the sense that right now is one of those moments when we are influencing the future.

We've demonstrated a strong track record of being very disciplined with the use of our cash. We don't let it burn a hole in our pocket, we don't allow it to motivate us to do stupid acquisitions. And so I think that we'd like to continue to keep our powder dry, because we do feel that there are one or more strategic opportunities in the future.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

Focusing is about saying No.