Bill Gates — "I'm a big believer in the idea of giving back."

"I'm not in politics, but I do think it's fascinating how politics works."

"I would like to see immigration exceptions for 'smart people.'"

"The most amazing philanthropists are people who are actually making the money themselves."

"I do hope that people who are rich will find ways to give their wealth back to society with high impact. Clearly, they've got skills."

"I really had a lot of fun, and I think I learned a lot. I learned a lot about how to build a company, and how to build a product. And I learned a lot about how to deal with all the challenges that com…"