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

Friedrich Nietzsche

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Source
Human, All-Too-Human
Date
1909
English wording
Helen Zimmern — Translator · from German
Meaning

Meaning of “Convictions are more dangerous enemies of truth than…”

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

Source context

Where does it come from?

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

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CuriosityDeepHonestyHumilityMindPhilosophyShortThinking Quotes About Reasoning, Reflection & JudgmentThought-Provoking Quotes That Invite ReflectionTruthBeliefDoubt
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Nothing is so firmly believed, as what we least know.
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“Nothing is so firmly believed, as what we least know.”

Michel de Montaigne · Essays of Montaigne — Book I · 1580
Meaning & context

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.

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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.
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“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.”

Francis Bacon · The Advancement of Learning · 1605
Meaning & context

Intellectual confidence can be improved by beginning with questions rather than pretending certainty too early.

Source details

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.

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I neither know nor think that I know.
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“I neither know nor think that I know.”

Plato · Apology · c. 399 BCE setting
Voice: Dialogue speaker · Socrates
Meaning & context

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.

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We must know the truth; and we must avoid error.
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“We must know the truth; and we must avoid error.”

William James · The Will to Believe, and Other Essays in Popular Philosophy · 1897
Meaning & context

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 details

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.

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He who knows only his own side of the case, knows little of that.
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“He who knows only his own side of the case, knows little of that.”

John Stuart Mill · On Liberty · 1859
Meaning & context

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.

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Theories thus become instruments, not answers to enigmas, in which we can rest.
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“Theories thus become instruments, not answers to enigmas, in which we can rest.”

William James · Pragmatism: A New Name for Some Old Ways of Thinking · 1907
Meaning & context

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 details

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.

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