As human beings, we always expect everyday change to happen slowly and steadily, and for there to be some relationship between cause and effect.

A prediction, in a field where prediction is not possible, is no more than a prejudice.

The biggest mistake we make is trying to square the way we feel about something today with the way we felt about it yesterday. You shouldn’t even bother doing it. You should just figure out the way you feel today and if it happens to comply with what you thought before, fine. If it contradicts it, whatever. Life goes on.

Those with health insurance are overinsured and their behavior is distorted by moral hazard. Those without health insurance use their own money to make decisions based on an assessment of their needs. The insured are wasteful. The uninsured are prudent. So what's the solution? Make the insured a little more like the uninsured.

Starting epidemics requires concentrating resources on a few key area. The Law of the Few says that Connectors, Mavens, and Salesman are responsible for starting word-of-mouth epidemics, which means that if you are interested in starting a word-of-mouth epidemic , your resources ought to be solely concentrated on these three groups. No one else matters.

Innovation-the heart of the knowledge economy-is fundamentally social.

I'm a purist: I start to wrinkle my nose when the Cold War ends.