You have to really believe in what you're doing, be passionate enough about it so that you will put in the hours and hard work that it takes to actually succeed there, and then you'll be successful.

I just kind of had this naive approach to - well, gee, you know, why not. I’ll just go ahead and do it.

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.

Microloans enable the poor to lift themselves out of poverty through entrepreneurship.

By building a simple system, with just a few guiding principles, eBay was open to organic growth.

You have to really believe in what you're doing, be passionate enough about it so that you will put in the hours and hard work that it takes to actually succeed there, and then you'll be successful.

In 1991, I co-founded my first start-up, Ink Development, which made software for an early tablet computer.