"So far as hypotheses are concerned, let no one expect anything certain from astronomy, which cannot furnish it, lest he accept as the truth ideas conceived for another purpose, and depart from this study a greater fool than when he entered it"
About this Quote
The intent is defensive and surgical: separate mathematical modeling from metaphysical truth-claims. He’s essentially saying, don’t confuse a system designed to “save the appearances” (predict planetary positions) with a final account of reality. That distinction matters because his heliocentric proposal was, at first blush, exactly the sort of idea critics could dismiss as a clever computational trick or denounce as heresy. By insisting astronomy “cannot furnish” certainty, he lowers the stakes while smuggling in a revolutionary rearrangement of the cosmos.
The subtext is also a jab at intellectual vanity. Astronomy attracts the kind of mind that likes clean, total explanations; Copernicus implies that appetite is precisely what makes you gullible. Accepting hypotheses “conceived for another purpose” points to the era’s habit of importing philosophical doctrines into observational science - forcing the sky to obey inherited categories.
Contextually, this is a scientist negotiating a world where evidence, mathematics, and authority didn’t share the same jurisdiction. His caution isn’t retreat; it’s a rhetorical shield that lets a dangerous idea circulate long enough to do its work.
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Citation Formats
APA Style (7th ed.)
Copernicus, Nicolaus. (2026, January 18). So far as hypotheses are concerned, let no one expect anything certain from astronomy, which cannot furnish it, lest he accept as the truth ideas conceived for another purpose, and depart from this study a greater fool than when he entered it. FixQuotes. https://fixquotes.com/quotes/so-far-as-hypotheses-are-concerned-let-no-one-3097/
Chicago Style
Copernicus, Nicolaus. "So far as hypotheses are concerned, let no one expect anything certain from astronomy, which cannot furnish it, lest he accept as the truth ideas conceived for another purpose, and depart from this study a greater fool than when he entered it." FixQuotes. January 18, 2026. https://fixquotes.com/quotes/so-far-as-hypotheses-are-concerned-let-no-one-3097/.
MLA Style (9th ed.)
"So far as hypotheses are concerned, let no one expect anything certain from astronomy, which cannot furnish it, lest he accept as the truth ideas conceived for another purpose, and depart from this study a greater fool than when he entered it." FixQuotes, 18 Jan. 2026, https://fixquotes.com/quotes/so-far-as-hypotheses-are-concerned-let-no-one-3097/. Accessed 13 Feb. 2026.



