I used to hold a unitary view, in which I proposed that only experienced happiness matters, and that life satisfaction is a fallible estimate of true happiness.

The average investor's return is significantly lower than market indices due primarily to market timing.

I'm not a great believer in self-help.

The premise of this book is that it is easier to recognize other people's mistakes than your own.

Groups tend to be more extreme than individuals.

The illusion that we understand the past fosters overconfidence in our ability to predict the future.

Facts that challenge basic assumptions-and thereby threaten people's livelihood and self-esteem-are simply not absorbed. The mind does not digest them.