Introverts feel “just right” with less stimulation, as when they sip wine with a close friend, solve a crossword puzzle, or read a book. Extroverts e… - Susan Cain

Americans prioritize happiness so much that we wrote the pursuit of it into our founding documents, then proceeded to write over thirty thousand books on the subject, as per a recent Amazon search. We’re taught from a very young age to scorn our own tears (“Crybaby!”), then to censure our sorrow for the rest of our lives. In a study of more than seventy thousand people, Harvard psychologist Dr. Susan David found that one-third of us judge ourselves for having “negative” emotions such as sadness and grief.

Sometimes speakers need to talk about subjects that don't interest them much, especially at work. I believe this is harder for introverts, who have trouble projecting artificial enthusiasm. But there's a hidden advantage to this inflexibility: it can motivate us to make tough but worthwhile career changes if we find ourselves compelled to speak too often about topics that leave us cold. There is no one more courageous than the person who speaks with the courage of his convictions.

The highly sensitive [introverted] tend to be philosophical or spiritual in their orientation, rather than materialistic or hedonistic. They dislike small talk. They often describe themselves as creative or intuitive. They dream vividly, and can often recall their dreams the next day. They love music, nature, art, physical beauty. They feel exceptionally strong emotions — sometimes acute bouts of joy, but also sorrow, melancholy, and fear. Highly sensitive people also process information about their environments — both physical and emotional — unusually deeply. They tend to notice subtleties that others miss — another person's shift in mood, say, or a lightbulb burning a touch too brightly.