People like the robber barons assumed that the doctrine of the survival of the fittest authenticated them as deserving power. You know, "I'm the richest. Therefore, I'm the best. God's in his heaven, etc." And that reaction of the robber barons was so irritating to people that it made it unfashionable to think of an economy as an ecosystem. But the truth is that it is a lot like an ecosystem. And you get many of the same results.

A few public hangings will really change behavior. One of our Presidents said if he could execute three people each year for no cause, it would make it a lot easier to govern. When someone said that's not enough, he said, "Oh yes it is, because I'd publish the list of people under consideration."

If you buy something because it's undervalued, then you have to think about selling it when it approaches your calculation of its intrinsic value. That's hard. But if you buy a few great companies, then you can sit on your ass. That's a good thing.

Whenever you think something or some person is ruining your life, it's you. A victimization mentality is so debilitating.

Bull markets go to people's heads. If you're a duck on a pond, and it's rising due to a downpour, you start going up in the world. But you think it's you, not the pond.

How do you compete against a true fanatic? You can only try to build the best possible moat and continuously attempt to widen it.

You must have the confidence to override people with more credentials than you whose cognition is impaired by incentive-caused bias or some similar psychological force that is obviously present. But there are also cases where you have to recognize that you have no wisdom to add - and that your best course is to trust some expert.