In essence, the optimistic style involves taking credit for successes but little blame for failures.

There are domains in which expertise is not possible. Stock picking is a good example. And in long-term political strategic forecasting, it's been shown that experts are just not better than a dice-throwing monkey.

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.

People's mood is really determined primarily by their genetic make-up and personality, and in the second place by their immediate context, and only in the third and fourth place by worries and concerns and other things like that.

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

The brains of humans contain a mechanism that is designed to give priority to bad news.

In a rising market, enough of your bad ideas will pay off so that you'll never learn that you should have fewer ideas.