„It was mathematics, the non-empirical science par excellence, wherein the mind appears to play only with itself, that turned out to be the science of sciences, delivering the key to those laws of nature and the universe that are concealed by appearances.“

— Hannah Arendt

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„The work of science is to substitute facts for appearances, and demonstrations for impressions.“
— John Ruskin
„Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena.“
— Albert Einstein