"In bodies moved, the motion is received, increased, diminished, or lost, according to the relations of the quantity of matter and velocity; each diversity is uniformity, each change is constancy"
About this Quote
Newton’s blunt machinery gets a French makeover here: not just laws of motion, but a worldview where change can be audited. Montesquieu (writing as Charles de Secondat) takes the physics of transmission - motion “received, increased, diminished, or lost” depending on mass and velocity - and turns it into an argument about intelligibility. The line reads like a tidy lab note, but it’s really a political and philosophical mood: the modern hunger to believe that what looks chaotic is governed by relations you can name.
The sly move is the second clause. “Each diversity is uniformity, each change is constancy” sounds paradoxical, almost mystical, yet it’s a rationalist flex. Variation isn’t evidence against order; variation is the proof of a deeper regularity. Montesquieu is building the intellectual alibi for comparative thinking: if societies differ, those differences can still be explained by stable forces - climate, institutions, commerce, education - interacting like mass and velocity. He’s rehearsing the method that will power The Spirit of the Laws: stop moralizing “strange” customs, start mapping the conditions that make them predictable.
Context matters: early Enlightenment France is obsessed with system-building, and Newton is cultural capital. Invoking mechanics signals seriousness while quietly attacking superstition and arbitrary authority. The subtext is disciplinary: reality, including human reality, isn’t a drama of pure will. It’s relations. If you can measure the relations, you can criticize power without sounding like you’re merely complaining. That’s the Enlightenment’s most effective weapon: inevitability dressed up as reason.
The sly move is the second clause. “Each diversity is uniformity, each change is constancy” sounds paradoxical, almost mystical, yet it’s a rationalist flex. Variation isn’t evidence against order; variation is the proof of a deeper regularity. Montesquieu is building the intellectual alibi for comparative thinking: if societies differ, those differences can still be explained by stable forces - climate, institutions, commerce, education - interacting like mass and velocity. He’s rehearsing the method that will power The Spirit of the Laws: stop moralizing “strange” customs, start mapping the conditions that make them predictable.
Context matters: early Enlightenment France is obsessed with system-building, and Newton is cultural capital. Invoking mechanics signals seriousness while quietly attacking superstition and arbitrary authority. The subtext is disciplinary: reality, including human reality, isn’t a drama of pure will. It’s relations. If you can measure the relations, you can criticize power without sounding like you’re merely complaining. That’s the Enlightenment’s most effective weapon: inevitability dressed up as reason.
Quote Details
| Topic | Wisdom |
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