Source identified
“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.
Source identified
“Reading is thinking with some one else's head instead of one's own.”
Reading supplies another mind’s thought, but Schopenhauer warns that consuming ideas should not replace the work of forming one’s own connected judgment.
Source note: Essay “On Books and Reading,” in a public-domain English collection of Schopenhauer’s essays.
Source identified
“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.
Source identified
“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.
Source identified
“Learning without thought is labour lost; thought without learning is perilous.”
Study and reflection are treated as partners: information without examination is shallow, while speculation without learning can drift away from reality.
Source note: Analects 2:15 in James Legge’s translation; the saying balances study with independent reflection.
Source identified
“Theories thus become instruments, not answers to enigmas, in which we can rest.”
James describes theories as tools for moving inquiry and experience forward rather than final intellectual resting places that eliminate the need for further testing or revision.
Source note: Pragmatism, Lecture II, “What Pragmatism Means”; Project Gutenberg #5116. Capitalization has been normalized from the represented all-caps sentence while the wording is otherwise preserved.