The recognition of our own mistakes should not benefit us any more than the study of our successes. But there is a natural tendency in all men to avoid punishment. When you associate certain mistakes with a licking, you do not hanker for a second dose, and, of course, all stock-market mistakes wound you in two tender spots -- your pocketbook and your vanity. But I will tell you something curious: A stock speculator sometimes makes mistakes and knows that he is making them. And after he makes them he will ask himself why he made them; and after thinking over it cold-bloodedly a long time after the pain of punishment is over he may learn how he came to make them, and when, and at what particular point of his trade; but not why. And then he simply calls himself names and lets it go at that.

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