We have technology, finally, that for the first time in human history allows people to really maintain rich connections with much larger numbers of people.

I've got a passion for solving a problem that I think I can solve in a new way. And that maybe it helps that nobody has done it before as well.

Whatever future you're building, don't try to program everything.

You should pursue your passion. If you're passionate about something and you work hard, then I think you will be successful.

I built a system simple enough to sustain itself.

In the same way that you're driven in your business to keep innovating - Facebook is a wonderful example of constant innovation - think about doing that in philanthropy.

When you look at the accomplishments of accomplished people and you say, “Boy, that must have been really hard,” ... that was probably easy. And conversely, when you look at something that looks easy, that was probably hard. And so you’re never going to know which is which until you actually go and do it.