The interesting thing about advertising is that the things that annoy us sometimes about it are really human. It's us looking at ourselves - and like all human endeavors it's imperfect.

Separation anxiety is assuaged by constant connection. Young people announce every detail of their lives on services like Twitter not to show off, but to avoid the closed door at bedtime, the empty room, the screaming vacuum of an isolated mind.

We should talk about the ultimate cause of war. It's a question we should never stop asking, because if we do, there's a chance, however remote, that we might miss an opportunity to reduce the occurrence of war.

The most effective young Facebook users, however -- the ones who will probably be winners if Facebook turns out to be a model of the future they will inhabit as adults -- are the ones who create successful online fictions about themselves.

We're losing track of the vastness of the potential for computer science. We really have to revive the beautiful intellectual joy of it, as opposed to the business potential.

I think most of the dramatic new ideas come from little companies that then grow big.

I think that one can seek a way to eliminate war, and still agree that fighting the Nazis was a good thing.