Being confident and believing in your own self-worth is necessary to achieving your potential.

You know, there has never been a 24-hour period in five years when I have not responded to e-mail at Facebook. I am not saying it's easy. I work long hours.

There is no such thing as work-life balance. There is work, there is life, and there is no balance.

Its time to cheer on girls and women who want to sit at the table

There is no perfect fit when you're looking for the next big thing to do. You have to take opportunities and make an opportunity fit for you, rather than the other way around. The ability to learn is the most important quality a leader can have.

I just believed. I believed that the technology would change people's lives. I believed putting real identity online - putting technology behind real identity - was the missing link.

At Facebook we feel a lot of affinity not just for this community but for any community that is trying to do what Davos is trying to do, which is to share information. And Davos is doing it in a particular way - I think the Facebook approach is obviously more broad-based, we're trying to include everyone in the world. But the goal is the same: bring people together, to share information and make the world more connected, and have people have a deeper understanding of themselves, others, the communities of which they want to be a part and can be a part.