A species in which everyone was General Patton would not succeed, any more than would a race in which everyone was Vincent van Gogh. I prefer to think that the planet needs athletes, philosophers, sex symbols, painters, scientists; it needs the warmhearted, the hardhearted, the coldhearted, and the weakhearted. It needs those who can devote their lives to studying how many droplets of water are secreted by the salivary glands of dogs under which circumstances, and it needs those who can capture the passing impression of cherry blossoms in a fourteen-syllable poem or devote twenty-five pages to the dissection of a small boy’s feelings as he lies in bed in the dark waiting for his mother to kiss him goodnight . . . Indeed the presence of outstanding strengths presupposes that energy needed in other areas has been channeled away from them.
From Quiet: The Power of Introverts in a World That Can’t Stop Talking by Susan Cain