Never judge a decision purely by its result, especially when randomness and “external factors” play a role. A bad result does not automatically indicate a bad decision and vice versa. So rather than tearing your hair out about a wrong decision, or applauding yourself for one that may have only coincidentally led to success, remember why you chose what you did. Were your reasons rational and understandable? Then you would do well to stick with that method, even if you didn’t strike it lucky last time." The Art of Thinking Clearly Rolf Dobelli