I had always imagined Rosa Parks as a stately woman with a bold temperament, someone who could easily stand up to a busload of glowering passengers. But when she died in 2005 at the age of ninety-two, the flood of obituaries recalled her as soft-spoken, sweet, and small in stature. They said she was "timid and shy" but had "the courage of a lion." They were full of phrases like "radical humility" and "quiet fortitude.

Many people believe that introversion is about being antisocial, and that's really a misperception. Because actually it's just that introverts are differently social. So they would prefer to have a glass of wine with a close friend as opposed to going to a loud party full of strangers.

We don't need giant personalities to transform companies. We need leaders who build not their own egos but the institutions they run.

In a way, education by its nature favours the extrovert because you are taking kids and putting them into a big classroom, which is automatically going to be a high-stimulation environment. Probably the best way of teaching in general is one on one, but that's not something everyone can afford.

Flow is an optimal state in which you feel totally engaged in an activity...In a state of flow, you're neither bored nor anxious, and you don't question your own adequacy. Hours pass without your noticing.

Eleanor Roosevelt, Rosa Parks, Gandhi — all these peopled described themselves as quiet and soft-spoken and even shy. And they all took the spotlight, even though every bone in their bodies was telling them not to.

But when the group is literally capable of changing our perceptions, and when to stand alone is to activate primitive, powerful, and unconscious feelings of rejection, then the health of these institutions seems far more vulnerable than we think.