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.

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."

Clearly, the decision-making that we rely on in society is fallible. It's highly fallible, and we should know that.

People talk of the new economy and of reinventing themselves in the workplace, and in that sense most of us are less secure.

Each additional day together is a gift. The end of the day means the end of hostilities, the recognition that the underlying shared values and commitment to the relationship trump the need for one last dig or self-righteous justification.

We have a very narrow view of what is going on.

Optimistic people play a disproportionate role in shaping our lives. Their decisions make a difference; they are inventors, entrepreneurs, political and military leaders - not average people. They got to where they are by seeking challenges and taking risks.