The extra daily social time of 1.7 hours in weekends raises average happiness by about 2%.

We have associations to things. We have, you know, we have associations to tables and to - and to dogs and to cats and to Harvard professors, and that's the way the mind works. It's an association machine.

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

When people believe a conclusion is true, they are also very likely to believe arguments that appear to support it, even when these arguments are unsound.

If there was one ubiquitous recommendation about marriage it was this: "Don't go to bed angry."

Mental effort, I would argue, is relatively rare. Most of the time we coast.

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.