Original artwork, not a still
Misattributed to Stephen Hawking
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
Behind the line
What it means
Our interpretation.
It warns that the real danger is not knowing nothing but being sure you know. That is why it suits arguments about overconfidence, from science teaching to conspiracy theories, and why a physicist's name makes it feel weightier. The truer attribution is a librarian-historian, a fitting home for a line about the weight of received facts.
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In context
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The saying was attributed to Stephen Hawking by 2001, but Quote Investigator found no substantive evidence that he used it. The likely source is the historian Daniel Boorstin, Librarian of Congress, interviewed in The Washington Post in January 1984: the greatest obstacle to discovery is not ignorance but the illusion of knowledge. Boorstin never claimed the idea as wholly his own; he credited a similar notion to Edward Gibbon and elsewhere called it an aphorism. A related thought by Henry Thomas Buckle appeared in 1861, calling inertness the great enemy of knowledge.
Sources (1)
- Quote Investigator: The Greatest Obstacle to Discovery Is Not Ignorance, It Is the Illusion of Knowledgereply section and the 1984 Boorstin and 1861 Buckle citationsReference checked
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