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Knowledge quotes — Page 2

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Source identified51
All men by nature desire to know.

“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 details

Aristotle, Metaphysics, Book I, Chapter I, W. D. Ross translation (1908), validated Wikisource scan leaf 21. 'All men by nature desire to know' opens the work before the discussion of sensation, memory, experience, art and knowledge. This remains ancient philosophy mediated by translation, not a modern empirical finding about cognition.

Source identified52
It is a capital mistake to theorize before one has data.

“It is a capital mistake to theorize before one has data.”

Holmes argues that explanations should follow evidence because an early theory can tempt a person to force later facts into a preferred story.

Source details

“A Scandal in Bohemia,” The Adventures of Sherlock Holmes (1891), Project Gutenberg #1661. Holmes immediately warns that premature theorizing leads people to twist facts to suit theories; it is fictional detective dialogue.

Source identified53
The world is full of obvious things which nobody by any chance ever observes.

“The world is full of obvious things which nobody by any chance ever observes.”

Holmes distinguishes mere visibility from real observation: information can be plainly present and still go unused when attention remains superficial.

Source details

The Hound of the Baskervilles, Chapter III, “The Problem,” Project Gutenberg #2852. Sherlock Holmes says that the world is full of obvious things nobody observes after inferring from Watson’s clean clothes and boots that he spent the rainy day indoors, then asks Watson to infer where Holmes himself has been. It remains fictional detective dialogue illustrating Holmes’s observational method rather than a universal scientific rule.

Source identified54
Its one source is the knowledge of Ideas; its one aim the communication of this knowledge.

“Its one source is the knowledge of Ideas; its one aim the communication of this knowledge.”

Within Schopenhauer’s aesthetics, art begins in a mode of apprehending what he calls Ideas and succeeds by communicating that apprehension through an artistic medium; this is his philosophical theory of art rather than a universal empirical definition.

Source details

The World as Will and Idea, Vol. I, Third Book, §36, Haldane and Kemp translation, Project Gutenberg #38427. The sentence immediately follows Schopenhauer’s answer that art is the kind of knowledge concerned with the Ideas outside ordinary relations.

Source identified55
Diversity repels; likeness attracts.

“Diversity repels; likeness attracts.”

The concise axiom is one premise in Boethius’s metaphysical argument: things are described as tending toward what is like them, not as a modern empirical rule about human attraction or relationships.

Source details

How Substances Can Be Good in Virtue of Their Existence Without Being Absolute Goods (De Hebdomadibus), preliminary proposition IX, H. F. Stewart / E. K. Rand 1918 edition, Project Gutenberg #13316. Kept as a historical metaphysical premise, not social-science evidence.

Source identified56
There are many things which can be separated by a mental process, though they cannot be separated in fact.

“There are many things which can be separated by a mental process, though they cannot be separated in fact.”

Boethius distinguishes conceptual analysis from physical separation: the mind can consider a feature on its own even when the thing and that feature cannot actually be pulled apart in reality.

Source details

How Substances Can Be Good in Virtue of Their Existence Without Being Absolute Goods (De Hebdomadibus), H. F. Stewart / E. K. Rand 1918 edition, Project Gutenberg #13316. The sentence introduces a metaphysical method by distinguishing mental abstraction from actual separation.

Source identified57
Learning without thought is labour lost; thought without learning is perilous.

“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 details

Analects 2:15 in James Legge’s translation; the saying balances study with independent reflection.

Source identified58
A wise man, therefore, proportions his belief to the evidence.

“A wise man, therefore, proportions his belief to the evidence.”

Hume argues that confidence should rise or fall with the strength and consistency of the available evidence rather than remain fixed regardless of what experience supports.

Source details

An Enquiry Concerning Human Understanding, Section X, ‘Of Miracles,’ Part I, paragraph 87 in the represented Selby-Bigge text, Project Gutenberg #9662. ‘A wise man, therefore, proportions his belief to the evidence’ follows Hume's discussion of varying degrees of assurance from experience. It is eighteenth-century epistemological argument and preserves the connective ‘therefore’; it is not a complete modern statistical or scientific decision rule.

Source identified59
ignorance gives one a large range of probabilities.

“ignorance gives one a large range of probabilities.”

Voice: Narrator voice · Narrator

The narrator uses irony to show how not knowing enough can make almost anything seem plausible, widening speculation rather than understanding.

Source details

Daniel Deronda; narrator’s ironic observation while Gwendolen speculates about Grandcourt, represented from Project Gutenberg #7469.

Source identified60
Knowledge is love and light and vision.

“Knowledge is love and light and vision.”

Knowledge is described as more than stored information: it enlarges understanding, connection, possibility, and the ability to perceive a wider world.

Source details

The Story of My Life; Keller describes education as an opening into intellectual and emotional life.

Source identified61
Books are the treasured wealth of the world and the fit inheritance of generations and nations.

“Books are the treasured wealth of the world and the fit inheritance of generations and nations.”

Books preserve thought across generations, allowing intellectual and cultural inheritance to travel farther than the lives of individual writers and readers.

Source details

Walden, Reading chapter; Thoreau describes enduring books as a form of inherited cultural wealth.

Source identified62
I am not young enough to know everything.

“I am not young enough to know everything.”

Barrie reverses the cliché that age brings complete wisdom, making youthful certainty—not age—the comic claim to omniscience.

Source details

The Admirable Crichton, Act I, Project Gutenberg #3490. Ernest Woolley repeatedly delivers “I am not young enough to know everything” as a self-consciously clever epigram while Agatha, Treherne and the others struggle to understand it; Crichton later says he has no idea what Ernest meant. It remains fictional comic dialogue rather than J. M. Barrie autobiography or a factual claim about age and knowledge.

Source identified63
If any of you lack wisdom, let him ask of God, that giveth to all men liberally.

“If any of you lack wisdom, let him ask of God, that giveth to all men liberally.”

The verse treats wisdom as something worth actively seeking and asking for rather than assuming one already possesses enough.

Source details

James 1:5, King James Version.

Source identified64
Secrets lurk on all sides.

“Secrets lurk on all sides.”

The brief line frames observation as discovery: familiar landscapes still contain details that reward patience, questions, and repeated looking.

Source details

Wake-Robin; the phrase belongs to Burroughs’s description of the naturalist’s expectant attention to the world nearby.

Source identified65
Our business here is not to know all things, but those which concern our conduct.

“Our business here is not to know all things, but those which concern our conduct.”

Locke places useful limits around intellectual ambition: human inquiry need not comprehend everything in order to guide life well, and knowing where understanding stops is part of using it responsibly.

Source details

An Essay Concerning Humane Understanding, Book I, Chapter I, section 6, Project Gutenberg #10615. Locke follows his sounding-line analogy by saying that our business is not to know all things but those concerning conduct. The passage belongs to seventeenth-century epistemology and moral reflection, not a modern cognitive-science finding.

Source identified66
All books are divisible into two classes, the books of the hour, and the books of all time.

“All books are divisible into two classes, the books of the hour, and the books of all time.”

Some books answer a temporary need while others continue to reward readers across generations; the distinction encourages deliberate choices about what deserves sustained attention.

Source details

Sesame and Lilies; Ruskin distinguishes temporary reading from books whose value endures beyond their immediate moment.

Source identified67
He who knows only his own side of the case, knows little of that.

“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 details

On Liberty, Chapter 2; Mill argues for open discussion because opposing views expose weaknesses and sharpen understanding.

Source identified68
Science, my lad, has been built upon many errors; but they are errors which it was good to fall into, for they led to the truth.

“Science, my lad, has been built upon many errors; but they are errors which it was good to fall into, for they led to the truth.”

Professor Lidenbrock argues that mistaken hypotheses can still advance inquiry when testing them exposes better explanations.

Source details

A Journey into the Interior of the Earth, Chapter XXXI, ‘Preparations for a Voyage of Discovery,’ represented by Project Gutenberg #3748 in F. A. Malleson's 1877 English translation. Professor Lidenbrock says that science has been built upon many errors after underground observations conflict with accepted heat theory. It remains translated speculative-adventure dialogue and a character's philosophy of scientific error, not a methodological rule supplied by Quote Atlas or a current scientific finding.

Source identified69
for experience does not always mean wisdom.

“for experience does not always mean wisdom.”

Voice: Fictional character · Tin Woodman

The Tin Woodman separates accumulated experience from sound judgment, suggesting that time lived does not automatically produce wisdom.

Source details

The Marvelous Land of Oz, represented by Project Gutenberg #54. The Tin Woodman—referred to in the scene as the emperor—says this to the Saw-Horse after it claims to learn quickly despite little experience. It is fictional dialogue, not Baum autobiography.

Source identified70
Reading is the most rational employment, if people seek food for the understanding.

“Reading is the most rational employment, if people seek food for the understanding.”

Reading is valuable when it feeds judgment and understanding rather than becoming a performance of remembering words without examining their ideas.

Source details

Thoughts on the Education of Daughters (1787), “READING,” printed page 49, Project Gutenberg #67466. Wollstonecraft calls reading the most rational employment when people seek food for the understanding, contrasting reflective reading with merely collecting words or quotations; this is eighteenth-century educational argument rather than a current evidence-based teaching prescription.

Source identified71
Unless we are transformed we cannot finally stand, and without more light we cannot be transformed.

“Unless we are transformed we cannot finally stand, and without more light we cannot be transformed.”

Arnold links durable social improvement to transformation in understanding, arguing that inherited energy and honesty are insufficient without greater intellectual light.

Source details

Discourses in America, Preface, Project Gutenberg #44919. Arnold argues that England’s inherited energy, courage and moral conduct are insufficient without intellectual “light,” concluding that transformation requires more understanding. This is Victorian cultural-political criticism and metaphorical rhetoric, not a scientific or therapeutic claim.

Source identified72
Nothing is so firmly believed, as what we least know.

“Nothing is so firmly believed, as what we least know.”

Certainty can be strongest where understanding is weakest, so confidence by itself is poor evidence that a belief has been examined well.

Source details

Essays of Montaigne, Book I, Chapter XXXI, ‘That a Man Is Soberly to Judge of the Divine Ordinances,’ Charles Cotton translation edited by William Carew Hazlitt (1877); Project Gutenberg Volume 06 #3586 / Complete Essays #3600. The sentence appears in Montaigne’s skeptical warning about confidence concerning unknown things and speculative claims about divine purposes.

Source identified73
I only gathered acquaintance with the public aspect of the city, the same that she shows to the meanest stranger.

“I only gathered acquaintance with the public aspect of the city, the same that she shows to the meanest stranger.”

Even after deliberate observation, Montaigne admits that a visitor may know only the public face of a place, making limits of access and outsider perspective part of responsible travel judgment.

Source details

The Journal of Montaigne’s Travels in Italy, Volume II, Rome, W. G. Waters translation, Project Gutenberg #70839. Montaigne says this after describing how actively he sought out Roman public life; the point is epistemic modesty about what a stranger can really know, not a claim that travel is futile.

Source identified74
The old believe everything: the middle-aged suspect everything: the young know everything.

“The old believe everything: the middle-aged suspect everything: the young know everything.”

The epigram compresses three stereotypes of certainty into one balanced joke, mocking credulity, suspicion, and youthful overconfidence at once.

Source details

“Phrases and Philosophies for the Use of the Young,” first published in The Chameleon in 1894.

Source identified75
I neither know nor think that I know.

“I neither know nor think that I know.”

Voice: Dialogue speaker · Socrates

Socrates locates a small advantage in recognizing the boundary of his own knowledge: uncertainty is intellectually healthier than possessing the same ignorance while mistaking it for wisdom.

Source details

Plato, Apology, Benjamin Jowett translation, Project Gutenberg #1656. Socrates says this after examining a politician whom others considered wise; the wording is dialogue speech attributed to Socrates within Plato’s work, not a claim that Socrates knew literally nothing.

Source identified76
And this is why knowledge is more honourable and excellent than true opinion, because fastened by a chain.
Image design Charcoal

“And this is why knowledge is more honourable and excellent than true opinion, because fastened by a chain.”

Voice: Dialogue speaker · Socrates

Socrates compares an accurate opinion with understanding that can remain stable because it is connected to an explanation. In his illustration, true beliefs are useful but may slip away until they are secured by an account of their causes; the chain is a metaphor, not a claim about literal memory storage.

Source details

Meno, around Stephanus 97e–98a, Socrates addressing Meno after the Daedalus-statue comparison. The quoted standalone sentence immediately follows Socrates’s argument that right opinions can guide action but need to be tied down by an account of their cause. Benjamin Jowett English translation, Project Gutenberg #1643. The text and translational phrasing are Jowett’s; the dialogue does not treat every true opinion as worthless.

Source identified77
Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.

“Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.”

Learning requires willingness to be corrected; rejecting every form of reproof blocks the feedback needed for growth.

Source details

Proverbs 12:1, King James Version.

Source identified78
A distinct university walks about under each man's hat.

“A distinct university walks about under each man's hat.”

Voice: Authorial / signed preface voice · Russell H. Conwell

Conwell’s metaphor presents each person’s powers of observation and reflection as a continuing source of self-education beyond formal institutions.

Source details

Every Man His Own University, Chapter I, “Every Man’s University,” Project Gutenberg #36955, copyright 1917 witness. Conwell opens the chapter with “A distinct university walks about under each man’s hat” and develops the metaphor through observation, reading and independent thought. It is historical motivational/educational rhetoric, not evidence that formal education is unnecessary.

Source identified79
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

“Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.”

Voice: Fictional character · The Astronomer

Knowledge needs ethical direction, while good intentions need understanding; either quality becomes inadequate when separated from the other.

Source details

Chapter 41; the Astronomer explains why both competence and moral character are needed for trust.

Source identified80
Does truth matter—clean, cold, unfriendly truth, Max Gottlieb’s truth?

“Does truth matter—clean, cold, unfriendly truth, Max Gottlieb’s truth?”

Martin questions whether his commitment to exact scientific truth is an ethical necessity or merely one personal passion among many competing human desires.

Source details

Arrowsmith, represented by Project Gutenberg #70875. The sentence is Martin Arrowsmith’s internal question during a conflict over public-health claims and scientific precision; it is fictional moral-scientific reflection, not medical advice.