"The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice"
About this Quote
Russell treats certainty the way a good doctor treats sugar: understandable craving, long-term damage. The line flatters and scolds at once. It concedes that the hunger for firm answers is "natural to man" - a built-in response to fear, confusion, and the social cost of saying "I don't know". Then he pivots with "nevertheless", the hinge that turns a human impulse into a moral-intellectual failing. Calling it a "vice" is deliberate: not an innocent mistake, but a habit you indulge because it feels good.
The subtext is aimed at the psychology of dogma. Certainty offers the emotional benefits of closure and the political benefits of authority; it lets you stop thinking and start ruling. Russell, writing in the shadow of totalizing ideologies and the carnage they rationalized, saw how the desire for airtight belief systems could be weaponized. The claim isn't that knowledge is impossible, but that pretending to possess final knowledge is a corruption of inquiry.
The sentence works rhetorically because it reframes epistemology as character. Russell isn't debating propositions; he's diagnosing a temperament. If you need certainty, you're not just wrong sometimes - you're structurally vulnerable to propaganda, cults, and confident charlatans. His broader philosophical project, shaped by the rise of scientific method and analytic clarity, insists that progress depends on tolerating ambiguity, living with probabilities, and letting evidence revise your pride. The barb lands because it exposes certainty as less like truth and more like comfort dressed up as principle.
The subtext is aimed at the psychology of dogma. Certainty offers the emotional benefits of closure and the political benefits of authority; it lets you stop thinking and start ruling. Russell, writing in the shadow of totalizing ideologies and the carnage they rationalized, saw how the desire for airtight belief systems could be weaponized. The claim isn't that knowledge is impossible, but that pretending to possess final knowledge is a corruption of inquiry.
The sentence works rhetorically because it reframes epistemology as character. Russell isn't debating propositions; he's diagnosing a temperament. If you need certainty, you're not just wrong sometimes - you're structurally vulnerable to propaganda, cults, and confident charlatans. His broader philosophical project, shaped by the rise of scientific method and analytic clarity, insists that progress depends on tolerating ambiguity, living with probabilities, and letting evidence revise your pride. The barb lands because it exposes certainty as less like truth and more like comfort dressed up as principle.
Quote Details
| Topic | Reason & Logic |
|---|---|
| Source | Help us find the source |
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