I don't think I've ever worked so hard on something, but working on Macintosh was the neatest experience of my life. Almost everyone who worked on it will say that. None of us wanted to release it at the end. It was as though we knew that once it was out of our hands, it wouldn't be ours anymore.

You've probably had somebody punch you in the stomach and it knocks the wind of you and you can't breathe. That's how I felt.

When you're a carpenter making a beautiful chest of drawers, you're not going to use a piece of plywood on the back, even though it faces the wall and nobody will ever see it. You'll know it's there, so you're going to use a beautiful piece of wood on the back.

I'm convinced that about half of what separates successful entrepreneurs from the non-successful ones is pure perseverance.

That's always been in my mind my metaphor for a team working really hard on something they're passionate about. It's that through the team, through that group of incredibly talented people bumping up against each other, having arguments, having fights sometimes, making some noise, and working together they polish each other and they polish the ideas, and what comes out are these really beautiful stones.

You are all over the map, figure out the top 5 things you want to focus on and get rid of the rest.

In order to learn how to do something well, you have to fail sometimes. In order to fail, there has to be a measurement system. And that's the problem with most philanthropy - there's no measurement system. You give somebody some money to do something and most of the time you can really never measure whether you failed or succeeded in your judgment of that person or his ideas or their implementation.