Explore Doubt quotations through truth and knowledge, freedom, control, and responsibility, time, mortality, and meaning. Compare how different writers frame the idea across distinct works and periods.
“I may be wrong.”
The admission places a limit on Washington’s own policy claims and models intellectual uncertainty rather than presenting judgment as infallible.
The Future of the American Negro, Chapter VIII; Project Gutenberg #26507. The sentence appears in Washington’s closing policy discussion immediately after his summary of dangers and immediately before his qualification that he may also be in some degree right.
“I neither know nor think that I know.”
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.
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.
“If you can trust yourself when all men doubt you.”
Self-trust is presented alongside humility: the poem immediately asks the reader to allow for other people’s doubts too.
If—, first stanza; the following line qualifies self-confidence with fairness toward doubters.
“The future is no more uncertain than the present.”
Whitman refuses to treat the future as uniquely unknowable: within the poem's larger meditation on what endures, present conditions are themselves unstable and changing, so uncertainty belongs to both horizons.
Leaves of Grass (1882), “Song of the Broad-Axe,” section 4; Wikisource 1882 transcription. The line appears after “And the dead advance as much as the living advance” and before Whitman turns from institutions and structures toward the personal qualities he says endure.
“As to the Adjective: when in doubt, strike it out.”
The mock rule is comic in its bluntness but also functions as concise writing advice: unnecessary modifiers can weaken direct expression when the writer is unsure they earn their place.
Pudd’nhead Wilson, Chapter XI epigraph; the sentence follows the three-part author compliment in the Calendar sequence.
“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.
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.
“Doubt of any sort cannot be removed except by Action.”
The fictional philosophy presented in Sartor argues that some uncertainty becomes clearer only after conduct tests an idea in experience rather than allowing speculation to continue without limit.
Sartor Resartus, Book II, Chapter IX, “The Everlasting Yea,” printed page 156 / Wikisource scan leaf 188 in The Works of Thomas Carlyle, Centenary Edition, Vol. I (New York: Charles Scribner’s Sons, 1896). “Doubt of any sort cannot be removed except by Action” appears inside Teufelsdröckh’s spiritual conversion and Carlyle’s claim that conviction becomes meaningful through conduct. This collection preserves the fictional-philosophical voice and religious setting rather than presenting the line as uncomplicated Carlyle autobiography or a modern psychological rule.
“Not knowing when the Dawn will come, I open every Door.”
Because opportunity and renewal cannot always be predicted, openness becomes a practical response to uncertainty rather than passive waiting.
Poem 1619; uncertainty about dawn becomes a reason to remain open to possibility.
“He never states as a fact that of which he is not sure.”
Intellectual honesty includes marking uncertainty rather than upgrading a guess into a fact, a habit that makes speech more reliable and accountable.
The Power of Truth, opening chapter, Project Gutenberg #56020; Jordan describes the speech of a person committed to truthfulness.
“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.
Human, All-Too-Human, Part I, aphorism 483, “The Enemies of Truth”; Helen Zimmern translation, 1909 edition.
“He who has conquered doubt and fear has conquered failure.”
Allen frames fear and doubt as forces that can stop effort before circumstances have actually decided the outcome.
As a Man Thinketh, “Thought and Purpose.”
“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.
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.
“All things that are still to come lie in uncertainty; live straightway!”
Uncertainty about the future becomes an argument for using the available present rather than waiting for perfect guarantees.
On the Shortness of Life, Chapter IX; follows Seneca’s contrast between what is in Fortune’s hands and what is presently one’s own.
“The present time is short, the future is doubtful, the past is certain.”
Seneca divides time into three conditions and gives the present special urgency because it is both available and quickly passing.
On the Shortness of Life, Chapter X; opening distinction between past, present and future.
“the moment you doubt whether you can fly, you cease for ever to be able to do it.”
Inside Barrie's fantasy narration, Peter's ability to fly is tied to undivided belief in that ability; as a quotation, the line works as a literary image of doubt interrupting action rather than as a literal psychological law.
Peter Pan in Kensington Gardens, Project Gutenberg #26998. The narrator comments on Peter after he feels shunned by the birds, explaining that losing faith in his power to fly would itself end that power within the story's fantasy logic. The line is narrator voice, not an autobiographical claim by Barrie.
“The value of philosophy is, in fact, to be sought largely in its very uncertainty.”
Russell argues that uncertainty can be intellectually valuable because it loosens inherited assumptions and makes room for examined alternatives.
The Problems of Philosophy, Chapter XV, “The Value of Philosophy,” printed page 242 / scan leaf 246 in the 1912 Williams & Norgate edition on Wikisource, cross-checked against Project Gutenberg #5827. “The value of philosophy is, in fact, to be sought largely in its very uncertainty” begins Russell’s concluding account of how philosophical doubt can loosen unexamined certainty; this is philosophical argument, not an empirical psychological finding.
“The judgment when formed is a decision; it closes (or concludes) the question at issue.”
Reflective judgment is not endless suspension: Dewey describes it as the point at which a particular uncertainty is concluded in a way that can also inform later judgments.
How We Think (1910), Chapter VIII, “Judgment: The Interpretation of Facts,” section 1, printed page 107, Project Gutenberg #37423. Dewey identifies a formed judgment as a decision that closes the issue at hand and may help establish a method for analogous later cases. The statement belongs to his early-twentieth-century theory of reflective judgment rather than current clinical, neuroscientific or experimentally settled cognitive science.
“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.
“Phrases and Philosophies for the Use of the Young,” first published in The Chameleon in 1894.
“Our doubts are traitors, and make us lose the good we oft might win, by fearing to attempt.”
Doubt becomes harmful when it stops useful action before reality has had a chance to test what might be possible.
Measure for Measure, Lucio to Isabella. The retained modern locator is Act I, Scene 4; the represented 1623 First Folio witness, reviewed through the 1910 Methuen facsimile transcription on Wikisource, labels the same scene Act I, Scene V (Scena Quinta). Lucio urges Isabella to test her ability to plead for Claudio rather than let doubt prevent the attempt. This is fictional dramatic speech, not Shakespeare speaking autobiographically or a universal psychological law.
“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.
Tao Teh King, Chapter 71, James Legge translation, Project Gutenberg #216.
“If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.”
Intellectual confidence can be improved by beginning with questions rather than pretending certainty too early.
The Advancement of Learning, First Book, Project Gutenberg #5500, transcribed from the 1893 Cassell & Company edition. Bacon contrasts impatience of doubt with mature suspension of judgment and then sets out two ways of contemplation before saying that beginning with certainties ends in doubts while beginning with doubts can end in certainties. It remains early-modern epistemological argument rather than a modern experimental rule for scientific method.
“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!”
Irving’s fictional historian mocks intellectual systems that impress spectators through confidence and complexity while remaining vulnerable to later correction.
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.
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.
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.
These routes are drawn from the quotations loaded on this page and are meant as starting points, not extra topic labels.
Concise lines for readers who want the core idea without a long passage.
Quotations connected with deeper interpretation, perspective, philosophy, or sustained thought.
Lines connected with action, discipline, effort, habits, work, or perseverance.
Material about failure, adversity, recovery, resilience, or learning from pressure.
Older works represented in the collection, useful for comparing how the topic changes across time.
