Security is, I would say, our top priority because for all the exciting things you will be able to do with computers - organizing your lives, staying in touch with people, being creative - if we don't solve these security problems, then people will hold back.

There are ecosystems like coral reefs [at risk] through ocean acidification. Those are valuable things that we should protect.

I set a rule that people weren't allowed to send good news unless they sent around an equal amount of bad news. We had to get a balanced picture. In fact, I kind of favored just hearing about the accounts we were losing because ... bad news is generally more actionable than good news.

The intersection of law, politics, and technology is going to force a lot of good thinking.

I have an excellent memory, a most excellent memory.

The misconception that aid falls straight into the hands of dictators largely stems from the Cold War era.

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.