Feeling confident - or pretending that you feel confident - is necessary to reach for opportunities. It's a cliché, but opportunities are rarely offered; they're seized.

The cost of stability is often diminished opportunities for growth.

Facebook is great for women and men. We are enormously flexible. We care a lot about great opportunities for women, we push ourselves to make things as flexible as possible.

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.