What he doesn’t realize is that, in spite of his enthusiasm, when he went from a carefree state of mind to a prevent-and-avoid mode of thinking, he shifted from a positive to a negative attitude. He’s no longer focused on just winning, but rather on how he can avoid pain by preventing the market from hurting him again. This kind of negative perspective isn’t any different from the tennis player or golfer who is focused on trying not to make a mistake, the more he tries not to make a mistake, the more mistakes he makes. However, this mode of thinking is much easier to recognize in sports
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