Introverts need to trust their gut and share their ideas as powerfully as they can. - Susan Cain

If you’re a teacher, enjoy your gregarious and participatory students. But don’t forget to cultivate the shy, the gentle, the autonomous, the ones with single-minded enthusiasms for chemistry sets or parrot taxonomy or nineteenth-century art. They are the artists, engineers, and thinkers of tomorrow.

"One noteworthy study suggests that people who suppress negative emotions tend to leak those emotions later in unexpected ways. The psychologist Judith Grob asked people to hide their emotions when she showed them disgusting images. She even had them hold pens in their mouths to prevent them from frowning. She found that this group reported feeling less disgusted by the pictures than did those who'd been allowed to react naturally. Later, however, the people who hid their emotions suffered side effects. Their memory was impaired, and the negative emotions they'd suppressed seemed to color their outlook. When Grob had them fill in the missing letter to the word "gr_ss", for example, they were more likely than others to offer "gross" rather than "grass". "People who tend to [suppress their negative emotions] regularly," concludes Grob, "might start to see their world in a more negative light." p. 223"

"Now that you're an adult, you might still feel a pang of guilt when you decline a dinner invitation in favor of a good book. Or maybe you like to eat alone in restaurants and could do without the pitying looks from fellow diners. Or you're told that you're "in your head too much", a phrase that's often deployed against the quiet and cerebral.

Or maybe there's another word for such people: thinkers."