We are approaching levels - if we're not beyond levels - of threshold for the number of messages that consumers can take in in a given day. There is a kind of hunger for some kind of new approach to getting the word out about something.

The Law of the Few... says that one critical factor in epidemics is the nature of the messenger.

The difference isn't resources, it's attitude.

What must underlie successful epidemics, in the end, is a bedrock belief that change is possible, that people can radically transform their behavior or beliefs in the face of the right kind of impetus.

Happiness, in one sense, is a function of how closely our world conforms to the infinite variety of human preference.

If people disobey, don't ask what is wrong with them, ask what's wrong with their leaders.

I don't think people are averse to thinking about things in a deep way, but we have limited time and opportunity to think about things in a deep way. I think that's why there is an appetite for non-fiction - it gives people the opportunity to reexamine ordinary experience and be smarter about it.