The concept of happiness has to be reorganised.

We can't live in a state of perpetual doubt, so we make up the best story possible and we live as if the story were true.

People are really happier with friends than they are with their families or their spouse or their child.

Doubting what you see is a very odd experience. And doubting what you remember is a little less odd than doubting what you see. But it's also a pretty odd experience, because some memories come with a very compelling sense of truth about them, and that happens to be the case even for memories that are not true.

All of us would be better investors if we just made fewer decisions.

Courage is willingness to take the risk once you know the odds. Optimistic overconfidence means you are taking the risk because you don't know the odds. It's a big difference.

One thing we have lost, that we had in the past, is a sense of progress, that things are getting better. There is a sense of volatility, but not of progress.