As a country and as a world, we are not comfortable with women in leadership roles. We call little girls bossy.

Women don't take enough risks. Men are just 'foot on the gas pedal.' We're not going to close the achievement gap until we close the ambition gap.

It's easy to dislike the few senior women out there. What if women were half the positions in power? It would be harder to dislike all of them.

Success for me is that if my son chooses to be a stay-at-home parent, he is cheered on for that decision. And if my daughter chooses to work outside the home and is successful, she is cheered on and supported.

I walk out of this office every day at 5:30 so I'm home for dinner with my kids at 6, and interestingly, I've been doing that since I had kids. I did that when I was at Google, I did that here, and I would say it's not until the last year, two years, that I'm brave enough to talk about it publicly. Now I certainly wouldn't lie, but I wasn't running around giving speeches on it." "...there's no such thing as work-life balance. There's work, and there's life, and there's no balance.

Motivation comes from working on things we care about. It also comes from working with people we care about.

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.