автор и писатель

Юрий Вигнер
есть разница между автором и писателем:
первый пишет и публикуется,
второй только пишет;
первый пьет в ресторане с издателем,
второй об издателях только читает и слышит.

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Clearly, Kirkegaard was not only a prolific author, he was also a prolific writer and his literary activity found expression not only in his published works but also in the mass of writings that were not published in his lifetime.
––––Kirkegaard’s Journals and Notebooks. v.1. Princeton University Press. 2007.