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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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“Read not to contradict and confute; nor to believe and take for granted; nor to find talk and discourse; but to weigh and consider.”
Bacon describes reading as active judgment rather than passive agreement or reflexive opposition, making careful consideration the central habit of serious study.
Source note: Of Studies, in Bacon’s instructions for how different kinds of books should be read.
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“The present state of things is the consequence of the former.”
Voice: Fictional character · Imlac
Understanding present conditions requires tracing the earlier choices and causes that produced them rather than treating the present as isolated.
Source note: Rasselas, Chapter XXX; Imlac argues that studying history helps people understand the sources of present benefits and harms.
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“All men by nature desire to know.”
Aristotle treats the desire for knowledge as a basic human tendency, giving curiosity a foundational place in the movement from perception toward understanding.
Source note: Metaphysics, Book I, chapter 1, W. D. Ross translation; the work opens with this claim before discussing sensation, memory, experience, art, and knowledge.
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“And pause awhile from Learning to be wise;”
Johnson distinguishes accumulating learning from exercising judgment, asking the scholar to interrupt pursuit of knowledge long enough to examine what wisdom requires.
Source note: The Vanity of Human Wishes (1749), Johnson’s imitation of Juvenal’s Tenth Satire; the line introduces a section on the hazards and disappointments surrounding learned ambition.
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“We must know the truth; and we must avoid error.”
James separates two intellectual duties—seeking truth and avoiding falsehood—to show that prioritizing one over the other can produce different habits of belief and inquiry.
Source note: The Will to Believe, essay “The Will to Believe”; Project Gutenberg #26659. James immediately argues that truth-seeking and error-avoidance are distinct laws rather than two phrasings of one command.