I don't believe we have a professional self from Mondays through Fridays and a real self for the rest of the time.

I don't believe we have a professional self Monday through Friday and a real self the rest of the time. It is all professional, and it is all personal.

But I really believe that when you give people authentic identity, which is what Facebook does, and you can be your real self and connect with real people online, things will change.

What would you do if you weren't afraid?

I don't pretend there aren't biological differences, but I don't believe the desire for leadership is hardwired biology, not the desire to win or excel. I believe that it's socialization, that we're socializing our daughters to nurture and our boys to lead.

Fortune does favor the bold and you'll never know what you're capable of if you don't try.