We believe strongly that in the long term, we will be better served - as shareholders and in all other ways - by a company that does good things for the world even if we forgo some short term gains. This is an important aspect of our culture and is broadly shared within the company.

What I would like to do is to leave behind a sustainable entity of a set of companies that operate in an exemplary manner in terms of ethics, values and continue what our ancestors left behind.

The question really is, are you improving the world? And you can do that in many models. You can do that in government, you can do that in a nonprofit, and you can do it in commercial enterprise.

No matter what your mission is, have some notion in your head. Forget the model, whether it's government or nonprofit or profit. Ask yourself the more important question: Is my mission improving the world? Are you sure about it? Seek to disconfirm that all the time. And if you can, change your mission.

From a very early age, I also realized I wanted to invent things. So I became really interested in technology and also then, soon after, in business, because I figured that inventing things wasn't any good; you really had to get them out into the world and have people use them to have any effect.

We're lucky to have a very direct relationship with our users, which creates a strong incentive for us to do the right thing .