An entrepreneur must deal with more uncertainty than a professional with a well-defined role.

When I was starting out, I followed along the path that seemed to be marked out for me - from high school to college to law school to professional life.

People don't want to believe that technology is broken. Pharmaceuticals, robotics, artificial intelligence, nanotechnology - all these areas where the progress has been a lot more limited than people think. And the question is why.

Credentials are critical if you want to do something professional. If you want to become a doctor or lawyer or teacher or professor, there is a credentialing process. But there are a lot of other things where it's not clear they're that important.

They transfer the prison, and all of a sudden all this money cuts loose, all these people cut loose.

A figure who receives money from abroad for his political work, and thus serves some foreign interest, cannot be a politician in Russia.

That's what PGA Tour golf is all about. It's a partnership with the community to help people to raise money for charity and to do it using golf as a platform.

One of the greatest investments of our lifetime has been New York City real estate, and investors made the highest returns when they bought stuff during the 1970s and 1980s when people were getting mugged. The lesson is that you make the most money when you buy stuff that's out of consensus.