The market forces you, if you’re going to succeed, to be completely honest with yourself. If you’re losing money, you are forced to confront that reality. It’s an objective reality, it’s right in front of you, and you have to acknowledge it. The market weeds out people who are unable to be honest with themselves.
Trading is one of the most self-revelatory things that a person can do. If you allow yourself to be really open, it’s like going through psychotherapy everyday.
– Robert Koppel