The gender stereotypes introduced in childhood are reinforced throughout our lives and become self-fulfilling prophesies. Most leadership positions are held by men, so women don't expect to achieve them, and that becomes one of the reasons they don't.

I wish I were strong enough to ignore what others say, but experience tells me I often can't. Allowing myself to feel upset, even really upset, and then move on - that's something I can do.

Give us a world where half our homes are run by men and half our institutions are run by women. I'm pretty sure that would be a better world.

There is no straight path from your seat today to where you are going. Don't try to draw that line. You will not just get it wrong, you'll miss big opportunities. And I mean big-like the Internet. Careers are not ladders, those days are long gone, but jungle gyms. Don't just move up and down, don't just look up, look backwards, sideways around corners. Your career and your life will have starts and stops and zigs and zags. Don't stress out about the white space-the path you can't draw- because there in lies both the surprises and the opportunities.

As a man gets more successful, powerful, he is more liked, and as a woman gets more successful, she is less liked, and that's true by both women and men.

My goal is very clear, and I wrote about it in Lean In, which is that women run half our companies and countries and men run half our homes. As much as I wish that could happen in four years, I don't think that's a likely time period. But I think it can happen sooner than we think. Part of it is having that aspiration and that goal. I think we too often suffer from the tyranny of low expectations.

I'd worked on leprosy and malaria in India [at the World Bank] and asked myself the question: Why do we let 2 million children die every year around the world for not having clean water? Because they're faceless and nameless. So, for me, Facebook looked like it was going to solve the problem of the invisible victim.