It’s not about revenues: the fundamental economics in digital business is scale and margins. The top line has become the bottom line.

I have invested in four social networks. More than any other. But that's in Russia and Poland.

Facebook now is mostly about people you know. In the future it could be about people you know less but are more important.

I must analyze, from what I do now, what will be the impact two or three or five years in the future. What is the statement I want to make?

Google never knew how successful key words would be.

It is hard to think of practical applications of the black hole. Because practical applications are so remote, many people assume we should not be interested. But this quest to understand the world is what defines us as human beings.

Facebook can be an accumulation of different intelligences.