Worrying in itself is not a bad thing. It shows you care. When it gets to that constant and obsessive point, though, it inhibits success. You become paralyzed by fear of making a mistake, causing you to not act. Overthinking is a self-destructive behavior, taking a serious toll on both your mental and physical health. You will develop anxiety, which not only causes emotional suffering, but over time will affect your heart, digestive, and nervous...