" Jung was the first to propose the model of psychic energy, suggesting that for introverts, energy flows inward, while for extroverts, energy flows outward. Introverts tend to embrace this definition. It fels right for us because we know exactly what it feels like to have our energy depleted when we have sent too much flowing outward. "

― Sophia Dembling , The Introvert's Way: Living a Quiet Life in a Noisy World