There are some conditions where you have to trust your intuition.

We are very influenced by completely automatic things that we have no control over, and we don't know we're doing it.

Below an income of ... $60,000 a year, people are unhappy, and they get progressively unhappier the poorer they get. Above that, we get an absolutely flat line. ... Money does not buy you experiential happiness, but lack of money certainly buys you misery.

The concept of happiness has to be reorganised.

The idea that you can ask one question and it makes the point - well, that wasn't how psychology was done at the time.

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

Question: So investors shouldn't delude themselves about beating the market? Answer: "They're just not going to do it. It's just not going to happen."