„The work of science is to substitute facts for appearances, and demonstrations for impressions.“

— John Ruskin

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„Politics is a science. You can demonstrate that you are right and that others are wrong.“
— Jean Paul Sartre
„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