"It is the weight, not numbers of experiments that is to be regarded"
About this Quote
The subtext is defensive as much as aspirational. Newton worked in an era when experimental philosophy was still competing with scholastic authority, alchemy, and speculative system-building. In that landscape, it was easy to claim victory by producing a parade of demonstrations. Newton’s line insists that not all experiments are equal; some are theatrics, some are noise, some are tweaks of the same idea. The “weight” test is a demand for experiments that constrain nature, not merely illustrate it.
There’s also a rhetorical move of moral economy: treat attention like a scarce resource. A few decisive, well-designed trials can carry more truth than a hundred incremental ones, especially if those hundred simply confirm what you already want to believe. Coming from the architect of the Principia’s austere reasoning, it’s a reminder that science’s prestige isn’t built on how much it does, but on how cleanly it compels assent.
Quote Details
| Topic | Science |
|---|---|
| Source | Help us find the source |
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APA Style (7th ed.)
Newton, Isaac. (2026, January 17). It is the weight, not numbers of experiments that is to be regarded. FixQuotes. https://fixquotes.com/quotes/it-is-the-weight-not-numbers-of-experiments-that-31630/
Chicago Style
Newton, Isaac. "It is the weight, not numbers of experiments that is to be regarded." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/it-is-the-weight-not-numbers-of-experiments-that-31630/.
MLA Style (9th ed.)
"It is the weight, not numbers of experiments that is to be regarded." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/it-is-the-weight-not-numbers-of-experiments-that-31630/. Accessed 7 Feb. 2026.





