Love is essential, gregariousness is optional. Auteur: Susan Cain Copy Quote More from Susan Cain “Do you really believe in what you said or wrote – in the thing that’s bringing …” “If a high-reactive toddler breaks another child's toy by mistake, studies show,…” “For example, highly sensitive people tend to be keen observers who look before …” “INTROVERTS are especially vulnerable to challenges like marital tension, a pare…”