“Today introversion and extroversion are two of the most exhaustively researched subjects in personality psychology,” says Susan Cain in her best-selling book Quiet: The Power of Introverts in a World That Can’t Stop Talking. To know why you are so quiet and not berate yourself because you are not as bubbly and naturally confident as your sister, brother, or coworker is a starting point of great health and relief for many. To know why you speak too quickly and tend to often offend others is equally valuable. These are the basics of knowledge gained when you know where you stand on the introversion-extroversion scale and the temperament mix categories. In…