Boastfulness is generally an admission of an inferiority complex.
Really capable people don't have to boast about their achievements; they let their actions speak for them. When you boast about your accomplishments, you are telling others that you are unsure of yourself and your value in the world. Baseball manager Tommy Lasorda once noted that there are those who watch things happen, those who wonder what happened, and those who make things happen. Strive to be one of those who make things happen. If you show others what you can do, they will respect you far more than if you had simply told them what you'd done. Anyone can quarrel with words, but actions speak for themselves.
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