Small actions, when multiplied by millions of users, can change the world.

Collaboration across borders and disciplines is the only way to tackle global health challenges.

I've never been a person that has been like, 'I want to be a role model.' But then you realize you are, and you have to be careful with what you say and do.

Envy is a really stupid sin because it’s the only one you could never possibly have any fun at. There’s a lot of pain and no fun. Why would you want to get on that trolley?