"Der heiligen Siebenzahl, der heiligen Neunzahl der Astrologie haftet kraft des Prototypus der Planetenwelt, der sich in ihnen darstellt, noch eine Art dämonisch-dinglicher Macht an; aber das a und b der Algebra, wie sie Vieta im 16. Jahrhundert als Analysis speciosa begründet, das x und y der analytischen Geometrie Descartes' und das dy und dx der Leibnizischen Infinitesimalrechnung sind Symbole, in denen sich nur noch die reine Kraft des mathematischen Denkens selbst darstellt."
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Original Language: German
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Sources
Ernst Cassirer, "Die Begriffsform im Mythischen Denken", in Ernst Cassirer: Wesen des Symbolbegriffs. Darmstadt 1969, S. 54
https://de.wikiquote.org/wiki/Ren%C3%A9_Descartes
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René Descartes
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