"To every action there is always opposed an equal reaction"
About this Quote
The specific intent is technical and polemical at once. In the late 1600s, explanations of motion were still haunted by Aristotelian common sense (objects “want” to rest) and by rival mechanical philosophies. Newton’s Third Law, articulated in the Principia, locks forces into pairs: no push without a pushback, no isolated cause without an accounting on the other side. That’s not just a handy rule; it’s a blueprint for doing science with conservation principles, for treating interactions as the basic unit of reality.
The subtext is authority through simplicity. By compressing a universe of collisions, rockets, and orbits into a single balanced sentence, Newton signals that complex phenomena can be derived rather than narrated. It also quietly dethrones human intuition: if you feel like you’re “acting” alone, the math says you’re not. Your agency is an interaction, and the world answers back with equal force every time.
Quote Details
| Topic | Science |
|---|---|
| Source | Later attribution: Isaac Newton (Isaac Newton) modern compilation
Evidence: aws of motion ii to every action there is always opposed an equal reaction or th Other candidates (2) Chemical Thermodynamics (Victor CM Freestone, 2025) compilation95.0% ... Isaac Newton wrote 67 : LAW III . To every action , there is always opposed an equal reaction : or the mutual act... Nuovo corso di chimica secondo i principi di Newton, e di... (Senac, M. de (Jean-Baptiste), 1693-1770, 1750) primary38.0% deva del vetro dantimonio trafparente lo abbruciava e lo poneva in un matraccio |
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Citation Formats
APA Style (7th ed.)
Newton, Isaac. (2026, February 7). To every action there is always opposed an equal reaction. FixQuotes. https://fixquotes.com/quotes/to-every-action-there-is-always-opposed-an-equal-31632/
Chicago Style
Newton, Isaac. "To every action there is always opposed an equal reaction." FixQuotes. February 7, 2026. https://fixquotes.com/quotes/to-every-action-there-is-always-opposed-an-equal-31632/.
MLA Style (9th ed.)
"To every action there is always opposed an equal reaction." FixQuotes, 7 Feb. 2026, https://fixquotes.com/quotes/to-every-action-there-is-always-opposed-an-equal-31632/. Accessed 19 Feb. 2026.









