Be an enzyme - a catalyst for change. As a slogan, I don't know if that's ever going to be right up there with Ich Bin Ein Berliner, or “I Have A Dream,” but there's a lot of truth to it.

When you don't know what to expect, prepare for the unexpected.

Long-term sustainable change happens if people discover their own power.

When I started eBay, it was a hobby, an experiment to see if people could use the Internet to be empowered through access to an efficient market. I actually wasn't thinking about it in terms of a social impact. It was really about helping people connect around a sphere of interest so they could do business.

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.

Build a platform - prepare for the unexpected...you' ll know you're successful when the platform you've built serves you in unexpected ways.

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.