That’s because negative emotions are essential, too. They help us survive. Fear propels us out of a burning building and makes us step gingerly to avoid a snake. Disgust shields us from poisons and makes us recoil from bad behavior. Anger alerts us to threats and provocations from others and sharpens our sense of right and wrong. Too much negative emotion, of course, is debilitating. But too little is also destructive.[10]
