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Deep quotes

A reflective editorial lens for source-backed quotations that reward sustained thought about identity, mortality, truth, freedom, suffering, meaning, and the structure of a good life. “Deep” describes the reading lens rather than one single subject.

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Source identified1
And yet, O my friend, if true opinion in law courts and knowledge are the same, the perfect judge could not have judged rightly without knowledge; and therefore I must infer that they are not the same.
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“And yet, O my friend, if true opinion in law courts and knowledge are the same, the perfect judge could not have judged rightly without knowledge; and therefore I must infer that they are not the same.”

Voice: Dialogue speaker · Socrates

Socrates argues that someone can arrive at a correct judgment on testimony without having witnessed or known the event firsthand. The example tests Theaetetus’s proposal that knowledge simply equals true opinion; the dialogue continues to investigate other proposed definitions rather than announcing a simple final formula.

Source details

Theaetetus, around Stephanus 201a–c, Socrates explaining his law-court counterexample while speaking with Theaetetus. Benjamin Jowett English translation, Project Gutenberg #1726. The full sentence is spoken by Socrates in the dramatic dialogue, not from Jowett’s prefatory commentary; no claim is made about modern evidence law.

Source identified2
leading an existence rich in thought and full of life and meaning, occupied by worthy and interesting objects as soon as ever he is free to give himself to them

“leading an existence rich in thought and full of life and meaning, occupied by worthy and interesting objects as soon as ever he is free to give himself to them”

Schopenhauer describes a meaningful intellectual life as one filled by sustained engagement with worthy objects of thought rather than by external stimulation alone.

Source details

The Wisdom of Life, T. Bailey Saunders translation; Project Gutenberg #10741. The wording belongs to Schopenhauer’s contrast between intellectual and ordinary forms of leisure.

Source identified3
And I have shown this of all inspirations to be the noblest and highest and the offspring of the highest to him who has or shares in it, and that he who loves the beautiful is called a lover because he partakes of it.
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“And I have shown this of all inspirations to be the noblest and highest and the offspring of the highest to him who has or shares in it, and that he who loves the beautiful is called a lover because he partakes of it.”

Voice: Dialogue speaker · Socrates

In Socrates’s myth of the soul, attraction to visible beauty can awaken memory of a higher beauty. The language of inspiration describes the philosophical ascent imagined by the dialogue; it does not reduce love to appearance or imply that a person literally remembers another lifetime.

Source details

Phaedrus, around Stephanus 249d–e, Socrates’s palinode and description of inspired recollection of true beauty. Benjamin Jowett English, Project Gutenberg #1636. This is Socrates speaking in Plato’s dialogue; the claim comes after his charioteer-and-soul allegory and should not be extracted as a universal account of romance.

Source identified4
Have mercy upon me, O LORD, for I am in trouble: mine eye is consumed with grief, yea, my soul and my belly.

“Have mercy upon me, O LORD, for I am in trouble: mine eye is consumed with grief, yea, my soul and my belly.”

Grief is described as affecting both inner life and the body, giving language to sorrow that feels physically exhausting as well as emotionally painful.

Source details

Psalm 31:9, King James Version; the speaker asks for mercy while describing distress, grief, and bodily depletion.

Source identified5
And I would ask you to be thinking of the truth and not of Socrates: agree with me, if I seem to you to be speaking the truth; or if not, withstand me might and main, that I may not deceive you as well as myself in my enthusiasm, and like the bee, leave my sting in you before I die.
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“And I would ask you to be thinking of the truth and not of Socrates: agree with me, if I seem to you to be speaking the truth; or if not, withstand me might and main, that I may not deceive you as well as myself in my enthusiasm, and like the bee, leave my sting in you before I die.”

Voice: Dialogue speaker · Socrates

Facing death, Socrates asks his friends to challenge the argument he is defending if they find it mistaken. His emphasis is on testing whether a claim is true rather than accepting it because of the speaker’s reputation, even when that speaker is himself. The appeal belongs to a debate, not a universal guarantee that his view of the soul is correct.

Source details

Phaedo, approximately Stephanus 91b–c, Socrates speaking to Simmias and Cebes after their objections to the arguments about the soul’s survival. He specifically asks them to contradict him if they think his reasoning is wrong. This is a complete sentence from Benjamin Jowett’s English translation, Project Gutenberg #1658, in the dialogue after the translator’s separate introduction. Socrates is a character and local speaker; do not attribute the sentence as a direct personal remark by Plato.

Source identified6
And so the good man ought to be Self-loving: because by doing what is noble he will have advantage himself and will do good to others.

“And so the good man ought to be Self-loving: because by doing what is noble he will have advantage himself and will do good to others.”

Aristotle distinguishes a worthy form of self-love from selfish appetite: the good person values the rational and noble part of life in a way that benefits both the self and other people.

Source details

Nicomachean Ethics, Book IX, Chapter VIII, Project Gutenberg #8438. The surrounding argument explicitly contrasts this noble “Self-loving” with the blameworthy form that grasps at wealth, honours and bodily pleasures, so the line is not a defense of simple selfishness.

Source identified7
The only freedom which deserves the name, is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it.

“The only freedom which deserves the name, is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it.”

Freedom is framed as room for self-directed living bounded by equal regard for other people’s ability to pursue their own good.

Source details

On Liberty, Chapter I; Mill states the liberty principle before developing its implications for individuality and social authority.

Source identified8
Twice two makes five is sometimes a very charming thing too.

“Twice two makes five is sometimes a very charming thing too.”

Voice: Fictional narrator · Underground Man

The absurd equation represents the human impulse to resist perfect rational calculation simply to preserve a sense of independent choice.

Source details

Notes from Underground, Part I, Chapter IX, Constance Garnett translation. The “twice two makes five” line immediately follows the narrator’s complaint about mathematical certainty. Verified against Project Gutenberg #600 and the 1918 Heinemann White Nights and Other Stories Wikisource text.

Source identified9
The great business of man's life, is to answer the end for which he lives;

“The great business of man's life, is to answer the end for which he lives;”

Voice: Authorial / signed preface voice · William Penn (signed preface voice)

Penn frames a meaningful life in explicitly Christian terms: a person’s central task is to live toward the religious purpose for which Penn believes human life was given.

Source details

No Cross, No Crown, Preface, Project Gutenberg #44895. Penn opens by saying that the great business of life is to answer the end for which one lives, immediately defining that end as glorifying God and saving one’s soul. The frozen catalog retains only the opening clause. This is explicitly Quaker Christian devotional exhortation, not a neutral or universal factual definition of life’s purpose.

Source identified10
God's in his heaven—All's right with the world!

“God's in his heaven—All's right with the world!”

Pippa’s song voices a moment of religious confidence and ordinary delight whose effect in the drama depends on other characters hearing it at morally decisive moments.

Source details

Pippa Passes (1841), represented in the Project Gutenberg Robert Browning works edition #59123. The lyric is sung by Pippa inside a verse drama; its Christian optimism is a character-song within the play, not a factual guarantee that every event is good.

Source identified11
Convictions are more dangerous enemies of truth than lies.

“Convictions are more dangerous enemies of truth than lies.”

Nietzsche warns that fixed certainty can block revision more effectively than an obvious falsehood because conviction can make contrary evidence harder to examine.

Source details

Human, All-Too-Human, Part I, aphorism 483, “The Enemies of Truth”; Helen Zimmern translation, 1909 edition.

Source identified12
Whenever I find myself growing grim about the mouth; whenever it is a damp, drizzly November in my soul; whenever I find myself involuntarily pausing before coffin warehouses, and bringing up the rear of every funeral I meet; and especially whenever my hypos get such an upper hand of me, that it requires a strong moral principle to prevent me from deliberately stepping into the street, and methodically knocking people’s hats off—then, I account it high time to get to sea as soon as I can.

“Whenever I find myself growing grim about the mouth; whenever it is a damp, drizzly November in my soul; whenever I find myself involuntarily pausing before coffin warehouses, and bringing up the rear of every funeral I meet; and especially whenever my hypos get such an upper hand of me, that it requires a strong moral principle to prevent me from deliberately stepping into the street, and methodically knocking people’s hats off—then, I account it high time to get to sea as soon as I can.”

Ishmael describes going to sea as his personal response when his mood turns bleak and restless, linking emotional self-recognition with movement toward the ocean.

Source details

Moby Dick; Or, The Whale, Chapter 1, “Loomings,” represented by Project Gutenberg #2701. Ishmael describes going to sea when his mood becomes grim, restless and drawn toward death imagery. The passage is fictional first-person narration and a literary coping pattern, not mental-health, suicide-prevention or medical advice.

Source identified13
To know and yet (think) we do not know is the highest (attainment); not to know (and yet think) we do know is a disease.

“To know and yet (think) we do not know is the highest (attainment); not to know (and yet think) we do know is a disease.”

The chapter values an awareness of the limits of knowledge and treats false certainty as a disorder of judgment, making intellectual humility a form of protection against confident ignorance.

Source details

Tao Teh King, Chapter 71, James Legge translation, Project Gutenberg #216.

Source identified14
The farther that one goes out (from himself), the less he knows.

“The farther that one goes out (from himself), the less he knows.”

The paradox warns that outward accumulation can become a distraction from direct understanding; more movement is not automatically the same as deeper knowledge.

Source details

Tao Teh King, chapter 47, James Legge translation; the sentence belongs to a passage about knowing without compulsive outward searching.

Source identified15
No one would have believed in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man’s and yet as mortal as his own;

“No one would have believed in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man’s and yet as mortal as his own;”

Wells opens by overturning ordinary human confidence and asking readers to imagine humanity itself as the observed and vulnerable species rather than the observer.

Source details

The War of the Worlds, Book One, Chapter I, “The Eve of the War,” Project Gutenberg #36. The sentence opens the novel by establishing the retrospective Martian-invasion premise and the narrator’s contrast between human complacency and extraterrestrial scrutiny. It is speculative-fiction narration, not a factual claim that Earth was observed by Martian intelligence.

Source identified16
The web of our life is of a mingled yarn, good and ill together.

“The web of our life is of a mingled yarn, good and ill together.”

Voice: Fictional character · First Lord

Human life is pictured as a fabric woven from favorable and painful threads rather than a story made from only one kind of experience.

Source details

All’s Well That Ends Well, Act IV, Scene 3; the First Lord reflects that human life is woven from good and ill together while discussing Bertram and Parolles. Verified against Wikisource’s 1910 facsimile transcription of the 1623 First Folio (folio spelling “The webbe of our life, is of a mingled yarne”); direct evidence resolves to the reviewed Act IV transcription.

Source identified17
Undoubtedly philosophers are in the right, when they tell us that nothing is great or little otherwise than by comparison.

“Undoubtedly philosophers are in the right, when they tell us that nothing is great or little otherwise than by comparison.”

Gulliver observes that judgments of size depend on a point of comparison, a lesson made vivid when his own body shifts from giant-scale in Lilliput to tiny scale in Brobdingnag.

Source details

Gulliver's Travels, Part II, Chapter I, Project Gutenberg #829. Lemuel Gulliver reflects that nothing is great or little except by comparison after finding himself tiny among the inhabitants of Brobdingnag, reversing his earlier giant-scale experience in Lilliput. This is fictional first-person satire and perspective play, not a universal philosophical proof.

Source identified18
All that a man achieves and all that he fails to achieve is the direct result of his own thoughts.

“All that a man achieves and all that he fails to achieve is the direct result of his own thoughts.”

Achievement is connected to the quality and direction of thought, while responsibility is placed on the person rather than on luck alone.

Source details

As a Man Thinketh, chapter “Thought and Purpose,” in the authorized edition.

Source identified19
To lose one parent may be regarded as a misfortune—to lose both seems like carelessness.

“To lose one parent may be regarded as a misfortune—to lose both seems like carelessness.”

Voice: Fictional character · Lady Bracknell

Lady Bracknell’s absurdly bureaucratic response turns tragedy into a social failing, which is funny because her concern for status overwhelms ordinary sympathy.

Source details

The Importance of Being Earnest, Act I; Lady Bracknell. Exact catalog wording is preserved in the scan-backed Samuel French acting text on Wikisource, scan leaf 24 / printed page 22, during her interrogation of Jack Worthing about his parentage.

Source identified20
History is a nightmare from which I am trying to awake.

“History is a nightmare from which I am trying to awake.”

Stephen compresses his troubled relation to inherited political, religious and personal history into an image of trying to wake from something oppressive that still shapes the present.

Source details

Ulysses, Episode 2 (“Nestor”), Project Gutenberg #4300. Stephen Dedalus says the line during his conversation with Mr Deasy; it is fictional dialogue inside a modernist novel and should not be flattened into Joyce’s direct historical thesis.

Source identified21
Old age surprises them while their minds are still childish.

“Old age surprises them while their minds are still childish.”

Years can accumulate without corresponding preparation or maturity when a person repeatedly postpones the work of deciding how they want to live.

Source details

On the Shortness of Life, Chapter IX; Seneca describes the engrossed reaching old age unprepared because they failed to notice its daily approach.

Source identified22
Insanity in individuals is something rare—but in groups, parties, nations, and epochs it is the rule.

“Insanity in individuals is something rare—but in groups, parties, nations, and epochs it is the rule.”

Collective belonging can amplify irrationality that would be less common in an isolated person, making group judgment worth examining critically.

Source details

Beyond Good and Evil, aphorism 156, Helen Zimmern translation.

Source identified23
A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.

“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.”

Custom can disguise error by making the familiar feel legitimate; critical judgment requires re-examining practices that have escaped scrutiny through repetition.

Source details

Common Sense (1776), Introduction. The represented opening sentence is verified in Project Gutenberg #147 and the validated scan-backed Wikisource transcription; Paine argues that familiarity can make a wrong practice appear right before public argument unsettles the custom.

Source identified24
If you can meet with Triumph and Disaster And treat those two impostors just the same.

“If you can meet with Triumph and Disaster And treat those two impostors just the same.”

Kipling’s speaker recommends maintaining steadiness toward both success and failure rather than allowing either outcome to determine one’s character or judgment.

Source details

“If—,” in Rewards and Fairies, Project Gutenberg #556. The poem presents a period ideal of masculine self-command through a sequence of conditional tests; the stored lines are literary and moral rhetoric, not a requirement to suppress normal emotion.

Source identified25
The mind that is disciplined by Purity and fortified by Wisdom, avoids all those lusts and desires which are inseparably bound up with affliction, and so arrives at enlightenment and peace.

“The mind that is disciplined by Purity and fortified by Wisdom, avoids all those lusts and desires which are inseparably bound up with affliction, and so arrives at enlightenment and peace.”

Allen links peace with disciplined attention and the cultivation of what he calls purity and wisdom, treating peace as the outcome of a moral practice rather than a momentary mood.

Source details

Out from the Heart, “The Nature and Power of Mind,” represented New York R. F. Fenno & Company edition, Project Gutenberg #74178. Allen contrasts an undisciplined attitude toward experience with a mind disciplined by his moral ideals; the passage is historical conduct-of-life teaching, not medical or therapeutic guidance.

Source identified26
When you have eliminated the impossible whatever remains, however improbable, must be the truth.

“When you have eliminated the impossible whatever remains, however improbable, must be the truth.”

Holmes presents elimination as a reasoning discipline: once genuinely impossible explanations are removed, attention must turn to the remaining explanation even when it initially seems unlikely.

Source details

The Sign of the Four, Chapter VI, ‘Sherlock Holmes Gives a Demonstration,’ Project Gutenberg #2097. Holmes tells Watson that after eliminating impossible entry routes, ‘whatever remains, however improbable, must be the truth,’ then applies the precept to the locked-room investigation and the hole in the roof. It is fictional detective reasoning in a specific evidential setup, not a universal rule that any improbable remaining hypothesis is automatically true without sound premises or exhaustive elimination.

Source identified27
They love us for their own sakes, and we love them for love’s sake.

“They love us for their own sakes, and we love them for love’s sake.”

Voice: Fictional character · Pelagia

Pelagia voices a painful asymmetry: what feels like self-giving love to one person may be experienced as self-interest or possession from the other side.

Source details

Hypatia — or New Foes with an Old Face, Chapter XXIV, “Lost Lambs,” Project Gutenberg #6308. Pelagia tells Philammon that men love women for their own sakes while women love “for love’s sake” during a distressed reflection on betrayal, dependence and the absent Amal. It is fictional dialogue in Kingsley’s historical novel, not a universal claim about men and women.

Source identified28
There is an ecstasy that marks the summit of life, and beyond which life cannot rise.

“There is an ecstasy that marks the summit of life, and beyond which life cannot rise.”

London’s narrator describes Buck’s intense absorption in movement and instinct as a peak state of aliveness within the novel’s imaginative account of the animal’s experience.

Source details

The Call of the Wild, Project Gutenberg #215. The sentence introduces a passage about Buck leading the pack and is literary narration that also compares artistic and martial absorption; it is not a scientific definition of peak experience.

Source identified29
It was one of those hours and scenes in which memory asserts an almost magical power, and, like the evening sun beaming on these mouldering towers, sends back her retrospective rays to light up the glories of the past.

“It was one of those hours and scenes in which memory asserts an almost magical power, and, like the evening sun beaming on these mouldering towers, sends back her retrospective rays to light up the glories of the past.”

Voice: Voice · Washington Irving (travel narrator)

Irving describes historical memory as transforming ruins into a vivid imaginative encounter with lives and cultures that are no longer physically present.

Source details

The Alhambra, in Irving’s authorial travel narrative, represented by Project Gutenberg #49947. The sentence occurs during an evening meditation amid the palace ruins; its “magical power” is literary imagery about memory and historical imagination, not a factual claim about memory science.

Source identified30
O, beware, my lord, of jealousy; It is the green-eyed monster which doth mock the meat it feeds on.

“O, beware, my lord, of jealousy; It is the green-eyed monster which doth mock the meat it feeds on.”

Voice: Fictional character · Iago

Jealousy is described as self-consuming because it feeds on suspicion while tormenting the person who carries it.

Source details

Othello, Act III, Scene III, reviewed against the scan-backed First Folio facsimile. Iago's green-eyed-monster image is manipulative fictional dialogue used while cultivating Othello's jealousy; it is not Shakespeare's direct psychological diagnosis or clinical evidence.

Source identified31
To be too conscious is an illness—a real thorough-going illness.

“To be too conscious is an illness—a real thorough-going illness.”

Voice: Fictional narrator · Underground Man

The Underground Man treats excessive self-consciousness as paralyzing because reflection can multiply doubt until decisive action becomes difficult.

Source details

Notes from Underground, Part I, Chapter II, Constance Garnett translation. The Underground Man calls excessive consciousness “an illness—a real thorough-going illness.” Verified against Project Gutenberg #600 and the 1918 Heinemann White Nights and Other Stories Wikisource text; this is fictional first-person polemic, not a clinical diagnosis.

Source identified32
But it is wonderful how soon you get used to things, even the things you want most.

“But it is wonderful how soon you get used to things, even the things you want most.”

The narrator notices that even long-desired changes can quickly lose their novelty once they become part of everyday life.

Source details

The Wouldbegoods, represented by Project Gutenberg #794. The observation appears in Nesbit’s comic children’s fiction and is filtered through the story’s child-centered narrative voice; it is literary observation rather than a measured claim about happiness.

Source identified33
The man who has no tincture of philosophy goes through life imprisoned in the prejudices derived from common sense, from the habitual beliefs of his age or his nation, and from convictions which have grown up in his mind without the co-operation or consent of his deliberate reason.

“The man who has no tincture of philosophy goes through life imprisoned in the prejudices derived from common sense, from the habitual beliefs of his age or his nation, and from convictions which have grown up in his mind without the co-operation or consent of his deliberate reason.”

Unexamined common sense can become a prison when inherited assumptions are accepted automatically instead of being tested by deliberate reasoning.

Source details

The Problems of Philosophy, Chapter XV, “The Value of Philosophy,” beginning on printed page 242 / scan leaf 246 and continuing onto printed page 243 / scan leaf 247 in the fully validated 1912 Williams & Norgate Wikisource scan, cross-checked against Project Gutenberg #5827. The “no tincture of philosophy” sentence criticizes inherited common-sense, national and habitual prejudices that have not been examined by deliberate reason; it remains Russell’s philosophical argument rather than a diagnosis of people who do not study philosophy.

Source identified34
Happy is the man who learns from the misfortunes of others.

“Happy is the man who learns from the misfortunes of others.”

Other people’s failures can become instruction when we pay attention to consequences before repeating the same mistake ourselves.

Source details

Moral printed after “The Lion, the Fox, and the Ass”; the fox changes his conduct after observing the ass’s fate.

Source identified35
Faith, therefore, allows the greatest latitude in philosophic speculation, allowing us without blame to think what we like about anything.

“Faith, therefore, allows the greatest latitude in philosophic speculation, allowing us without blame to think what we like about anything.”

Spinoza separates faithful conduct from enforced uniformity of speculation: people can differ widely in philosophical belief while still being judged by whether their teaching leads toward justice and charity rather than hatred.

Source details

A Theologico-Political Treatise — Part III, Chapter XIV, paragraph 77, Project Gutenberg #991. The frozen catalog preserves the opening of Spinoza’s longer sentence; the paragraph continues by condemning teachings tending toward obstinacy, hatred, strife and anger and praising justice and charity. This is seventeenth-century theological / political philosophy, not a modern empirical claim.

Source identified36
And thought is best when the mind is gathered into herself and none of these things trouble her—neither sounds nor sights nor pain nor any pleasure,—when she takes leave of the body, and has as little as possible to do with it, when she has no bodily sense or desire, but is aspiring after true being?
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“And thought is best when the mind is gathered into herself and none of these things trouble her—neither sounds nor sights nor pain nor any pleasure,—when she takes leave of the body, and has as little as possible to do with it, when she has no bodily sense or desire, but is aspiring after true being?”

Voice: Dialogue speaker · Socrates

Socrates argues that philosophical reflection is clearest when bodily sensations do not distract the soul from its inquiry. This belongs to his metaphysical case about knowledge, body and soul on the day of his death; it should not be confused with a modern scientific finding about the brain or with a general prohibition on sensory experience.

Source details

Plato, Phaedo, approximately 65c–d; Socrates speaking with Simmias about the philosopher’s pursuit of true being and the limits of bodily perception. Benjamin Jowett English, Project Gutenberg #1658, dramatic text (not the editorial introduction).

Source identified37
One ever feels his twoness,—an American, a Negro; two souls, two thoughts, two unreconciled strivings; two warring ideals in one dark body, whose dogged strength alone keeps it from being torn asunder.

“One ever feels his twoness,—an American, a Negro; two souls, two thoughts, two unreconciled strivings; two warring ideals in one dark body, whose dogged strength alone keeps it from being torn asunder.”

Du Bois names the strain of double-consciousness: a self forced to negotiate both its own identity and the degrading external gaze of a racist society.

Source details

The Souls of Black Folk, “Of Our Spiritual Strivings.” Project Gutenberg #408. The sentence follows Du Bois’s definition of double-consciousness and belongs to his analysis of Black American life under the color line.

Source identified38
For what a man is in himself, what accompanies him when he is alone, what no one can give or take away, is obviously more essential to him than everything he has in the way of possessions

“For what a man is in himself, what accompanies him when he is alone, what no one can give or take away, is obviously more essential to him than everything he has in the way of possessions”

Schopenhauer ranks enduring personal qualities above possessions, placing character and inner resources closer to the center of life than external ownership.

Source details

The Wisdom of Life, T. Bailey Saunders translation; Project Gutenberg #10741. The sentence continues by contrasting inner qualities with social reputation.

Source identified39
The Analytical Engine has no pretensions whatever to originate anything. It can do whatever we know how to order it to perform.

“The Analytical Engine has no pretensions whatever to originate anything. It can do whatever we know how to order it to perform.”

Lovelace cautions readers not to attribute independent origination to Babbage’s proposed machine, distinguishing programmed operations from the human knowledge used to specify them.

Source details

Ada Lovelace, Note G to her 1843 translation of Luigi Menabrea’s “Sketch of the Analytical Engine Invented by Charles Babbage.” The claim concerns the proposed Analytical Engine in its historical design context and is not generalized into a factual limit on modern AI systems.

Source identified40
The fool who knows his foolishness, is wise at least so far. But a fool who thinks himself wise, he is called a fool indeed.

“The fool who knows his foolishness, is wise at least so far. But a fool who thinks himself wise, he is called a fool indeed.”

The verse treats recognition of one’s own foolishness as the beginning of wisdom, while self-certainty without understanding becomes a deeper form of ignorance.

Source details

Dhammapada 63, Chapter V, “The Fool,” F. Max Müller translation, Project Gutenberg #2017. The verse belongs to a Buddhist canonical collection and remains a textual source voice rather than a modern individual-author quotation.

Source identified41
The unreasonableness of a thing is no argument against its existence, but rather a condition thereof.

“The unreasonableness of a thing is no argument against its existence, but rather a condition thereof.”

The aphorism separates the fact that something exists from the expectation that existence must be rational or well ordered.

Source details

Human, All-Too-Human, Part I, aphorism 515, “From Experience”; Helen Zimmern translation.

Source identified42
And we, on our part, will prove in answer to him that the madness of love is the greatest of heaven's blessings, and the proof shall be one which the wise will receive, and the witling disbelieve.
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“And we, on our part, will prove in answer to him that the madness of love is the greatest of heaven's blessings, and the proof shall be one which the wise will receive, and the witling disbelieve.”

Voice: Dialogue speaker · Socrates

Socrates reverses his earlier criticism of lovers by proposing that some kinds of inspired passion can be gifts rather than failings. His defense belongs to a mythical and philosophical speech, not to a claim that impulsive behavior is automatically beneficial or justified.

Source details

Phaedrus, around Stephanus 245b–c, in Socrates’s second speech (palinode) to Phaedrus following his retraction of the anti-lover argument. Benjamin Jowett English, Project Gutenberg #1636; the complete sentence occurs in the dramatic speech after examples of prophetic, religious and poetic inspiration. The divine origin of love is a claim of this ancient philosophical argument, not independently established evidence.

Source identified43
Certainly, it is heaven upon earth, to have a man's mind move in charity, rest in providence, and turn upon the poles of truth.

“Certainly, it is heaven upon earth, to have a man's mind move in charity, rest in providence, and turn upon the poles of truth.”

Bacon joins truth with charity and steadiness, presenting intellectual honesty as part of a well-ordered mind rather than a weapon for pride.

Source details

Francis Bacon, 'Of Truth,' essay I in the 1625 Essays; independently checked against the validated 1884 Works of Francis Bacon, Volume I scan leaf 139. The retained sentence closes Bacon's theological/philosophical truth discussion by linking charity, providence and truth; it is explicitly early-modern Christian-philosophical rhetoric, not clinical or scientific evidence.

Source identified44
First, do nothing inconsiderately, nor without a purpose.

“First, do nothing inconsiderately, nor without a purpose.”

Deliberate action begins by knowing why an act is being done instead of moving from impulse, distraction, or social pressure.

Source details

Meditations, Book XII, section 20, George Long translation.

Source identified45
If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind.

“If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind.”

Mill makes the number of people holding an opinion irrelevant to their right to silence dissent: minority speech remains worth protecting even when nearly everyone else believes it wrong.

Source details

On Liberty, Chapter II, Project Gutenberg #34901. Mill’s next argument is epistemic as well as political: suppressing an opinion can deprive everyone of truth or of the clearer understanding created when truth is tested against error.

Source identified46
Theories are the mighty soap-bubbles with which the grown-up children of science amuse themselves while the honest vulgar stand gazing in stupid admiration, and dignify these learned vagaries with the name of wisdom!

“Theories are the mighty soap-bubbles with which the grown-up children of science amuse themselves while the honest vulgar stand gazing in stupid admiration, and dignify these learned vagaries with the name of wisdom!”

Voice: Fictional narrator · Diedrich Knickerbocker

Irving’s fictional historian mocks intellectual systems that impress spectators through confidence and complexity while remaining vulnerable to later correction.

Source details

Knickerbocker's History of New York, Book I, Chapter II, Project Gutenberg #13042. Exact-witness review corrects the inherited broad Book I locator: the “mighty soap-bubbles” sentence closes the chapter’s comic survey of competing cosmogonic theories. It belongs to Diedrich Knickerbocker’s satirical pseudo-history and anti-pedantic rhetoric, not Irving rejecting science as a method.

Source identified47
It is to become a nobler creature, and to help all others to a higher human status during this brief span of earthly life.

“It is to become a nobler creature, and to help all others to a higher human status during this brief span of earthly life.”

Voice: Authorial / signed preface voice · Elizabeth Blackwell (address voice)

Blackwell describes professional and human development as inseparable from helping raise the condition and opportunities of other people.

Source details

Essays in Medical Sociology, Volume II, Essay I, ‘The Influence of Women in the Profession of Medicine,’ address delivered at the London School of Medicine for Women in October 1889, around printed page 8, Project Gutenberg #69998. Blackwell defines the great object of human life as becoming nobler and helping others while developing her historical argument about women's responsibilities and contribution to medicine. It remains period professional/social-reform rhetoric, not current clinical or professional guidance.

Source identified48
Blessedness is not the reward of virtue, but virtue itself;

“Blessedness is not the reward of virtue, but virtue itself;”

Spinoza argues that the highest form of flourishing is not an external prize paid for virtuous conduct but is bound up with the activity he calls virtue itself.

Source details

Ethics, Part V, Proposition XLII, R. H. M. Elwes translation represented by Project Gutenberg #3800. ‘Blessedness is not the reward of virtue, but virtue itself’ introduces Spinoza's proposition linking blessedness, knowledge, virtue and control of the emotions. It remains translation-mediated seventeenth-century metaphysical ethics, not a universal psychological measurement or clinical prescription.

Source identified49
A rational mind will be employ’d, it will never be satisfy’d in doing nothing, and if you neglect to furnish it with good materials, ’tis like to take up with such as come to hand.

“A rational mind will be employ’d, it will never be satisfy’d in doing nothing, and if you neglect to furnish it with good materials, ’tis like to take up with such as come to hand.”

Voice: Authorial / signed preface voice · Mary Astell

Astell argues that the mind naturally seeks occupation, so denying people serious intellectual material does not make the mind inactive; it leaves it to whatever material happens to be available.

Source details

A Serious Proposal to the Ladies, Part I, printed page 56 in the represented 1697 two-part edition, Project Gutenberg #54984. Astell writes that a rational mind will be employed while arguing that women denied serious intellectual education may be driven toward inferior materials. Original spelling is retained; the passage belongs to her explicitly religious and educational proposal, not contemporary educational-outcome research.

Source identified50
Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own;

“Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own;”

Swift jokes that readers readily recognize other people in satire while overlooking themselves, making self-exemption part of the very behavior satire exposes.

Source details

The Battle of the Books, 'The Preface of the Author,' represented by Project Gutenberg #623. Swift's 'satire is a sort of glass' image opens the Preface and explains why readers recognize other people's faults more readily than their own. The retained semicolon marks a frozen excerpt from a longer sentence; this is satirical/literary metaphor rather than a psychological measurement rule.

Topic guide

A quick guide to deep

Philosophical quotations are useful when they open a question rather than close it. A short line about truth, freedom, time, or meaning usually belongs to a larger argument.

Reading lenses

Identity and self-knowledgeMortality and timeTruth and realityFreedom, suffering, and meaning

How to use this page

Treat each quotation as an entry point. Compare authors, inspect the named source, and notice where two memorable lines offer incompatible answers to the same question.

Choose the lens that matches what you are looking for, then open a quotation for its source and context.

Reflective lens

Deep is a reading lens, not one subject

This collection crosses philosophy, life, truth, identity, mortality, relationships and other subjects. Inclusion means the represented idea rewards reflection; it does not mean every quotation is about the same thing.

490 sourced quotations

How to browse it

Choose a narrower route when you want a specific question rather than a broad reflective collection.

Why this collection is not ranked

This label is intentionally broad. A ranked core would imply more precision than the collection supports, so Quote Atlas keeps the full source-backed set available and lets narrower topics do the tighter curating.

Browse by reading angle

Choose a way into these deep quotes

These routes are drawn from the quotations loaded on this page and are meant as starting points, not extra topic labels.

Short & memorable

Concise lines for readers who want the core idea without a long passage.

  1. “Twice two makes five is sometimes a very charming thing too.” — Fyodor Dostoevsky · Notes from Underground
  2. “The great business of man's life, is to answer the end for which he…” — William Penn · No Cross, No Crown
  3. “God's in his heaven—All's right with the world!” — Robert Browning · Pippa Passes
  4. “Convictions are more dangerous enemies of truth than lies.” — Friedrich Nietzsche · Human, All-Too-Human
  5. “The farther that one goes out (from himself), the less he knows.” — Lao Tzu · Tao Teh King

Reflective & philosophical

Quotations connected with deeper interpretation, perspective, philosophy, or sustained thought.

  1. “And yet, O my friend, if true opinion in law courts and knowledge are…” — Plato · Theaetetus
  2. “leading an existence rich in thought and full of life and meaning, occupied by…” — Arthur Schopenhauer · The Wisdom of Life
  3. “And I have shown this of all inspirations to be the noblest and highest…” — Plato · Phaedrus
  4. “Have mercy upon me, O LORD, for I am in trouble: mine eye is…” — Psalms · King James Bible — Psalm 31:9
  5. “And I would ask you to be thinking of the truth and not of…” — Plato · Phaedo

Practical & action-oriented

Lines connected with action, discipline, effort, habits, work, or perseverance.

  1. “A long habit of not thinking a thing wrong, gives it a superficial appearance…” — Thomas Paine · Common Sense
  2. “If you can meet with Triumph and Disaster And treat those two impostors just…” — Rudyard Kipling · If—
  3. “The mind that is disciplined by Purity and fortified by Wisdom, avoids all those…” — James Allen · Out from the Heart
  4. “First, do nothing inconsiderately, nor without a purpose.” — Marcus Aurelius · Thoughts of Marcus Aurelius Antoninus

Growth through difficulty

Material about failure, adversity, recovery, resilience, or learning from pressure.

  1. “Have mercy upon me, O LORD, for I am in trouble: mine eye is…” — Psalms · King James Bible — Psalm 31:9
  2. “A long habit of not thinking a thing wrong, gives it a superficial appearance…” — Thomas Paine · Common Sense
  3. “If you can meet with Triumph and Disaster And treat those two impostors just…” — Rudyard Kipling · If—
  4. “Happy is the man who learns from the misfortunes of others.” — Aesop · Aesop’s Fables — The Lion, the Fox, and the Ass

Earlier sources

Older works represented in the collection, useful for comparing how the topic changes across time.

  1. “And yet, O my friend, if true opinion in law courts and knowledge are…” — Plato · Theaetetus
  2. “leading an existence rich in thought and full of life and meaning, occupied by…” — Arthur Schopenhauer · The Wisdom of Life
  3. “And I have shown this of all inspirations to be the noblest and highest…” — Plato · Phaedrus
  4. “Have mercy upon me, O LORD, for I am in trouble: mine eye is…” — Psalms · King James Bible — Psalm 31:9
  5. “And I would ask you to be thinking of the truth and not of…” — Plato · Phaedo
Browse by length

Choose how much context you want

The complete 490-quote collection includes several reading lengths. Pick a depth, or ignore length and keep browsing normally.

359

Quick scan

Concise quotations for comparing wording and emphasis quickly.

116

More context

Medium-length quotations that give the idea more room to develop.

15

Longer passages

Useful when qualification, narrative setting or a fuller argument matters.

Suggested routeStart with concise lines for range, move to medium-length quotations for more context, and use longer passages when the idea needs fuller development.

490 quotations total. The page loads a smaller initial browse set for speed; search covers the complete collection and Load more continues in collection order.

Key distinctions

Three useful distinctions in this collection

Short quotations can sound more absolute than the larger source argument. These prompts help preserve useful distinctions while browsing deep.

Useful contrasts

  • memorable language versus an actually difficult idea
  • identity versus the roles a person performs
  • freedom versus responsibility

Where a short line can mislead

Compression can make philosophy sound more certain than the source really is. The meaning notes therefore explain the immediate idea without pretending to summarize an entire philosophy.

These are editorial reading prompts for the topic as a whole, not automatic labels applied to every quotation or inferred only from the initial browse set.

Across time

Where these deep quotations sit historically

Era totals use the complete source-backed topic, not only the quotations loaded in the browse grid.

Source eras

  • Ancient / classical43 quotations
  • Ancient / medieval31 quotations
  • 1500s–1600s69 quotations
  • 1700s50 quotations
  • 1800s188 quotations
  • 1900s and later99 quotations
  • Undated / traditional10 quotations
Compare voices

How different writers approach deep

Each example comes from that writer’s complete source-backed intersection with this topic, not only from the quotations loaded above.

Authors and sources

Who speaks here, and which works are represented?