Just out of our respective graduate schools, my friend Warren Buffett and I entered the business world to find huge, predictable patterns of extreme irrationality. These irrationalities were obviously important to what we wanted to do, but our professors never mentioned them. Understanding the problem of irrationalities was not easy... I came to study the psychology of human misjudgement almost against my will: I rejected it until I realized that my attitude was costing me a lot of money and reduced my ability to help everything I loved.

—Charlie Munger