I started eBay as an experiment, as a side hobby basically, while I had my day job.

In order to access private capital, you have to provide competitive return on investment. In order to give competitive returns to investors, you've got to operate on a profitable basis and be thinking of yourself as a business.

I want people to be entrepreneurs, but I want them to do it for the right reasons, because they think they can change the world, because they think they have got something of value to give to the world. Not because they think they can make a lot of money.

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.

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.

We believe that business can be a tool for social good.

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