Enthusiasm (n.) is the intuitive's unrivalled gift — to kindle courage for anything new, though he may have dropped it himself by the morrow.
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Enthusiasm (n.) pours from the extravert's mouth as soon as it fills his heart; in the introvert it is the very thing that seals his lips.
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Enthusiasm (n.) is thunder resounding out of the earth — it can be the source of beauty, but it can also delude.
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Enthusiasm (n.) can be a gift of the gods or a monster from hell; the only lasting gain is heightened and broadened reflection.
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Enthusiasm (n.) is the secret of success in psychotherapy; a correct diagnosis and a grave nod at a bad prognosis are the lesser part of the medical art and can cripple it.