Experts don't know exactly where the boundaries of their expertise are.

Some achieve a reputation for great successes when in fact all they have done is take chances that reasonable people wouldn't take.

It's not a case of: 'Read this book and then you'll think differently. I've written this book, and I don't think differently.

It's nonsense to say money doesn't buy happiness, but people exaggerate the extent to which more money can buy more happiness.

Optimism is normal, but some fortunate people are more optimistic than the rest of us. If you are genetically endowed with an optimistic bias, you hardly need to be told that you are a lucky person - you already feel fortunate.

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.

We deeply want to be led by people who know what they're doing and who don't have to think about it too much.