„To study and not think is a waste. To think and not study is dangerous.“

— Confucius

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„Sometimes I think,” he told Tex, “that Th’Wing thinks that I am an idiot studying hard to become a moron—but flunking the course.“
— Robert A. Heinlein
„I am busy painting every day studies of the weavers here, which I think are technically better than the painted studies from Drenthe, which I sent you.“
— Vincent Van Gogh
„Study Herod, madame, study Herod.“
— Ambrose Bierce
„There are no dangerous thoughts; thinking it-self is dangerous.“
— Hannah Arendt