I lived on couches for something like six months. I had no home. I was totally broke. I would stay at a friend's house for two weeks, then move because I didn't want to become this permanent mooch.

If I were worried about my reputation, I wouldn't do anything with start-ups

I think the perception of wealth and power is that things just become easier and easier when in reality as you raise the stakes things become more stressful.

Little startups are ridiculously overfunded.

It seems like the right thing to do is tackle problems other people aren't working on.

I think Facebook's biggest problem is the glut of information that Facebook's power users are overwhelmed with.

You have got to be willing to be poor as an entrepreneur.