In return, society rewards those who give it what it wants. That is why how much money people have earned is a rough measure of how much they gave society what it wanted.

I learned that everyone makes mistakes and has weaknesses and that one of the most important things that differentiates people is their approach to handling them. I learned that there is an incredible beauty to mistakes, because embedded in each mistake is a puzzle, and a gem that I could get if I solved it, i.e. a principle that I could use to reduce my mistakes in the future.

You should have a strategic asset allocation mix that assumes that you don't know what the future is going to hold.

Radical transparency is critical to having an idea meritocracy because it shows what's actually happening without spin and prevents people from maneuvering politically behind each others' backs. It brings problems and weaknesses to the surface and allows people to see how they are dealt with, so it's great for training people on how to deal with real problems.

Don't be a perfectionist, because perfectionists often spend too much time on little differences at the margins at the expense of other big, important things. Be an effective imperfectionist. Solutions that broadly work well (e.g., how people should contact each other in the event of crises) are generally better than highly specialized solutions (e.g., how each person should contact each other in the event of every conceivable crisis).

I found that whenever I encountered a situation, rather than just reacting to it, it was tremendously useful to think carefully about how I should react to it and other situations like it. Besides providing me with more thoughtful responses in each of these cases, approaching things this way provided me and others with guidance on how to deal with similar situations when they came up in the future.

Constantly probe the people who report to you, and encourage them to probe you.