Except for some effects that I attribute mostly to age, my intuitive thinking is just as prone to overconfidence, extreme predictions, and the planning fallacy as it was before I made a study of these issues.

When action is needed, optimism, even of the mildly delusional variety, may be a good thing.

Banks are run by executives, and executives protect themselves, and that does not always mean that banks are going to behave rationally.

The psychologist, Paul Rozin, an expert on disgust, observed that a single cockroach will completely wreck the appeal of a bowl of cherries, but a cherry will do nothing at all for a bowl of cockroaches.

Survival prospects are poor for an animal that is not suspicious of novelty.

It's a wonderful thing to be optimistic. It keeps you healthy and it keeps you resilient.

Most of the time, we think fast. And most of the time we're really expert at what we're doing, and most of the time, what we do is right.