Soren Kierkegaard, Danish philosopher and theologian, c1840 (1956). [Getty Images]

Soren Kierkegaard, Danish philosopher and theologian, c1840 (1956). A print from People, a volume about the origin and early history of many things, common and less common, essential and inessential, by Readers Union, the Grosvenor Press, London, 1956. (Photo by The Print Collector/Print Collector/Getty Images)

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