God may not play dice with the universe, but something strange is going on with the prime numbers.

I hope we'll be able to solve these problems before we leave.

Inclusive, good-quality education is a foundation for dynamic and equitable societies.

We need to have a regulatory budget in America that limits the amount of regulations on our economy. We need to repeal and replace Obamacare, and we need to improve higher education so that people can have access to the skills they need for 21st century jobs.

I won't sell any Facebook shares as long as I'm on the board. When I leave, all my Facebook shares will be donated to two or three D.C. education-related charities I've supported over the years. Thus, a small portion of Facebook's success will be shared with low income students in Washington.

I had no books at home. I started to frequent a public library in Lisbon. It was there, with no help except curiosity and the will to learn, that my taste for reading developed and was refined.