"You cannot imagine the craving for rest that I feel-a hunger and thirst. For six long days, since my work was done, my mind has been a whirlpool, swift, unprogressive and incessant, a torrent of thoughts leading nowhere, spinning round swift and steady."

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The exaggerated dopamine sensitivity of the introvert leads one to believe that when in public, introverts, regardless of its validity, often feel to be the center of (unwanted) attention hence rarely craving attention. Extroverts, on the other hand, seem to never get enough attention. So on the flip side it seems as though the introvert is in a sense very external and the extrovert is in a sense very internal - the introvert constantly feels too much 'outerness' while the extrovert doesn't feel enough 'outerness'.

— Criss Jami