“Leave an extrovert alone for two minutes and he will reach for his cell phone. In contrast, after an hour or two of being socially “on,” we introverts need to turn off and recharge. My own formula is roughly two hours alone for every hour of socializing. This isn’t antisocial. It isn’t a sign of depression. It does not call for medication. For introverts, to be alone with our thoughts is as restorative as sleeping, as nourishing as eating. Our motto: “I’m okay, you’re okay—in small doses.”

“I will say that the socially oblivious extroverts do not represent the whole. As with introverts, social skills are independent of extroversion: some are skilled, some are not. The skilled ones know how to listen. But in contrast to socially unskilled introverts, who keep to themselves, socially unskilled extroverts insist on socializing.”

“What does an introvert do when he's left alone? He stays alone.”

“I’m the kind of person who likes to be by himself. To put a finer point on it, I’m the type of person who doesn’t find it painful to be alone. I find spending an hour or two every day running alone, not speaking to anyone, as well as four or five hours alone at my desk, to be neither difficult nor boring. I’ve had this tendency ever since I was young, when, given a choice, I much preferred reading books on my own or concentrating on listening to music over being with someone else. I could always think of things to do by myself.”

“The Socially Accessible introvert looks like an extrovert on the outside and sees extroversion as a bar that he or she can never quite reach. These individuals are often very successful in social arenas, but fault themselves for not having more fun.”

“Secondly, extroverts often incorrectly assume that introverts are suffering. Introverts internalize problems; we like to take things inside and work on them there. Extroverts prefer to externalize and deal with problems interactively. Because of this difference, introverts may seem psychologically burdened, while extroverts spread the burden around and seem healthier—from an extroverted standpoint. But note that I said introverts like to take problems inside. Sure, an introvert can overdo it, but so can the extrovert who feels compelled to express every unresolved thought or emotion. The former gets depressed or anxious and goes to therapy; the latter sends others to therapy.”