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“A little Learning is a dang’rous Thing.”
Partial knowledge can create confidence before understanding has become deep enough to recognize its limits.
Source note: An Essay on Criticism; Pope follows the line with the image of drinking deeply from the Pierian spring.
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“Reading is to the mind what exercise is to the body.”
Regular reading is compared with physical exercise because repeated intellectual use can strengthen attention, knowledge, and mental capacity over time.
Source note: The Tatler No. 147; the comparison presents reading as a form of regular exercise for the mind.
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“The true University of these days is a Collection of Books.”
Carlyle emphasizes independent access to accumulated thought, treating books as an education that extends beyond institutions.
Source note: On Heroes, Hero-Worship, and the Heroic in History, the lecture on the Hero as Man of Letters.
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“He who knows only his own side of the case, knows little of that.”
Understanding a position requires serious contact with competing arguments; familiarity with only one side can produce confidence without real comprehension.
Source note: On Liberty, Chapter 2; Mill argues for open discussion because opposing views expose weaknesses and sharpen understanding.
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“it is only when he has turned it over that he can be said to know it.”
Learning becomes knowledge, in this account, when material has been actively reconsidered and integrated rather than merely encountered or memorized.
Source note: The Art of Literature, section “On Thinking for Oneself,” T. Bailey Saunders translation; Project Gutenberg #10714. The preceding sentence says a person must first learn something before turning it over in the mind.
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“Is it not pleasant to learn with a constant perseverance and application?”
Learning becomes satisfying when it is sustained through repeated application rather than treated as a single act of exposure.
Source note: The Analects of Confucius, James Legge’s public-domain English translation; Book I opens by connecting learning with steady practice.