When Ford sells a car, a dealer isn't allowed to take out the engine and put a different one in. When a newsstand sells the Washington Post, no one can go to the newsstand and pay them to rip out the classified section and put their own classified section in - if they could, they would do so.

If you mess up, it's not your parents' fault, so don't whine about your mistakes, learn from them.

I'm going to retain a lot of Microsoft's stock.

Microsoft looks at new ideas, they don't evaluate whether the idea will move the industry forward, they ask, 'how will it help us sell more copies of Windows?

Security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally.

If you say to people that there's less violence today than in the past, they would be stunned to hear that. But it's the truth, even though we have awful things happening in Syria or Sudan.

The human body is the most complex system ever created. The more we learn about it, the more appreciation we have about what a rich system it is.