"The world today has 6.8 billion people... that's headed up to about 9 billion. Now if we do a really great job on new vaccines, health care, reproductive health services, we could lower that by perhap…"

"If you want to change the world, you have to be willing to take risks."

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

"I'm committing to learn and think more about the balance between privacy and security...."

"We're not going to achieve real progress unless we get more women into leadership roles."