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Quotations about knowledge
Note that not all quotations have been tagged, so the Search function may find additional quotations on this topic.
He who knows one, knows none.
Max Müller (1823-1900) German-British philologist, Orientalist, religious studies founder
“The Science of Religion,” Lecture 1, Royal Institution (19 Feb 1870), Lectures on the Science of Religion (1872)
(Source)
Regarding religion, paraphrasing Goethe on language ("He who knows one language, knows none").
They say a little knowledge is a dangerous thing, but it’s not one half so bad as a lot of ignorance.
The history of the human race is a continual struggle from darkness towards light. It is, therefore, to no purpose to discuss the use of knowledge; man wants to know, and when he ceases to do so, he is no longer man.
Fridtjof Nansen (1861-1930) Norwegian explorer, scientist, diplomat, humanitarian
“A New Route to the North Pole,” The Forum (Aug 1891)
(Source)
Knowledge fills a large brain; it merely inflates a small one.
Sydney J. Harris (1917-1986) Anglo-American columnist, journalist, author
“Strictly Personal” column (7 Jan 1982)
Ah, it’s a lovely thing to know a thing or two.
[Ah, la belle chose que de savoir quelque chose.]
Molière (1622-1673) French playwright, actor [stage name for Jean-Baptiste Poquelin]
The Bourgeois Gentleman [Le Bourgeois Gentilhomme], Act 2, sc. 4 [M. Jourdain] (1670)
Title also translated as The Middle-Class Gentleman, The Tradesman turned Gentleman, The Middle-Class Aristocrat or The Would-Be Noble.
It is unclear where this highly common translation is from. Most identifiable sources are much more prosaic.
- "Ah! What a fine thing it is to know something!" [tr. Woolerey, Act 2, sc. 6; Jones; Page]
- "Ah, how wonderful it is to know something!" [tr. Applebaum (1998)]
- "How fine a thing it is but to know something!" [Source]
- "It's so reassuring to know something." [tr. Bermel (1987)]
- "Oh, what a beautiful thing it is to know something!" [tr. Pergolizzi (1999)]
- "It's wonderful to know so many things!" [tr. Rippon (2001), Act 1, sc. 3]
- Original French
It takes a lot of things to prove you are smart, but only one thing to prove you are ignorant.
We are never so certain of our knowledge as when we’re dead wrong.
Adair Lara (b. 1952) American writer, columnist, teacher
“A Lot of Knowledge Is Dangerous, Too,” San Francisco Chronicle (9 Oct 1997)
(Source)
Science is the belief in the ignorance of the experts.
Richard Feynman (1918-1988) American physicist
“What Is Science?” address, National Science Teachers Association, New York (1966)
(Source)
“If you give a nigger an inch, he will take an ell. A nigger should know nothing but to obey his master — to do as he is told to do. Learning will spoil the best nigger in the world. Now, if you teach that nigger how to read, there would be no keeping him. It would forever unfit him to be a slave. He would at once become unmanageable, and of no value to his master. As to himself, it could do him no good, but a great deal of harm. It would make him discontented and unhappy.”
Frederick Douglass (1817-1895) American abolitionist, orator, writer
Narrative of the Life of Frederick Douglass, ch. 6 (1845)
(Source)
Quoting his master, Auld, chastising Mrs. Auld for teaching Douglass to read. Frequently paraphrased down to "Knowledge makes a man unfit to be a slave."
One of the greatest of joys known to man is to take such a flight into ignorance in search of knowledge. The great pleasure of ignorance is, after all, the pleasure of asking questions. The man who has lost this pleasure or exchanged it for the pleasure of dogma, which is the pleasure of answering, is already beginning to stiffen.
Robert Lynd (1892-1970) American sociologist [Robert Slaughton Lynd]
The Pleasure of Ignorance, ch. 1 (1921)
(Source)
The rule which should guide us in such cases is simple and obvious enough: that the aggregate testimony of our neighbours is subject to the same conditions as the testimony of any one of them. Namely, we have no right to believe a thing true because everybody says so unless there are good grounds for believing that some one person at least has the means of knowing what is true, and is speaking the truth so far as he knows it. However many nations and generations of men are brought into the witness-box, they cannot testify to anything which they do not know. Every man who has accepted the statement from somebody else, without himself testing and verifying it, is out of court; his word is worth nothing at all. And when we get back at last to the true birth and beginning of the statement, two serious questions must be disposed of in regard to him who first made it: was he mistaken in thinking that he knew about this matter, or was he lying?
William Kingdon Clifford (1845-1879) English mathematician and philosopher
“The Ethics of Belief,” Part 2 “The Weight of Authority,” Contemporary Review (Jan 1877)
(Source)
The fox knows many things, but the hedgehog knows one big thing.
[πόλλ’ οἶδ’ ἀλώπηξ, ἐχῖνος δ’ἓν μέγα]
Archilochus (c. 680-645 BC) Greek lyric poet and mercenary [Ἀρχίλοχος, Archilochos, Arkhilokhus]
Fragment 201
(Source)
As quoted in Isaiah Berlin, The Hedgehog and the Fox (1953). The fragment is found in a group of proverbs collected by Zenobius. Alt. trans.:
- The fox knows many things; the hedgehog one great thing.
- The fox knows many tricks; the hedgehog one good one.
- The fox knows many tricks; and the hedgehog only one; but that is the best one of all.
- Fox knows many, Hedgehog one solid trick.
- Fox knows tricks and still gets caught; Hedgehog knows one but it always works. (Source)
H.G. Wells said that history was a race between education and catastrophe, and it may be that the writer will add just sufficient impetus to education to enable it to outrace catastrophe. And if education wins by even the narrowest of margins, how much more can we ask for?
O’Brien knew everything. A thousand times better than Winston, he knew what the world was really like, in what degradation the mass of human beings lived and by what lies and barbarities the Party kept them there. He had understood it all, weighed it all, and it made no difference: all was justified by the ultimate purpose. What can you do, thought Winston, against the lunatic who is more intelligent than yourself, who gives your arguments a fair hearing and then simply persists in his lunacy?
George Orwell (1903-1950) English writer [pseud. of Eric Arthur Blair]
Nineteen Eighty-Four (1949)
(Source)
But beware you be not swallowed up in books: An ounce of love is worth a pound of knowledge.
John Wesley (1703-1791) English cleric, Christian theologian and evangelist, founder of Methodism
Letter to Joseph Benson (7 Nov 1768)
(Source)
An answer is invariably the parent of a great family of new questions.
John Steinbeck (1902-1968) American writer
The Log from the Sea of Cortez, ch. 16, March 25 (1951)
(Source)
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
Isaac Asimov’s Book of Science and Nature Questions (1988) [with Jason A. Schulman]
Ah, what a dusty answer gets the soul
When hot for certainties in this our life!
Books, that paper memory of mankind.
Arthur Schopenhauer (1788-1860) German philosopher
The Art of Literature, ch. 4 “On Men of Learning” [tr. Saunders (1851)]
(Source)
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Books have led some to learning and others to madness, when they swallow more than they can digest.
Francesco Petrarca (1304-1374) Italian scholar and poet [a.k.a. Petrarch]
Remedies for Fortune Fair and Foul [De Remediis Utriusque Fortunae] [tr. Elton (1893)]
Alt. trans.: "Books have brought some men to knowledge, and some to madness. whilst they drew out of them more than they could digest." [tr. Dobson (1791)]
Alt. trans.: "Books have led some to knowledge and some to madness, who drew from them more than they could hold." [tr. Rawski (1991)]
I believe it is better to tell the truth than to lie. I believe that it is better to be free than to be a slave. And I believe that it is better to know than to be ignorant.
H.L. Mencken (1880-1956) American writer and journalist [Henry Lewis Mencken]
“What I Believe,” sec. 6, Forum and Century (Sep 1930)
(Source)
He who knows does not speak.
He who speaks does not know.Lao-tzu (604?-531? BC) Chinese philosopher, poet [also Lao-tse, Laozi]
Tao-te Ching, ch. 56 [tr. Wing-Tsit Chan]
Fifty years from now, if an understanding of man’s origins, his evolution, his history, his progress is not in the common place of the school books, we shall not exist.
Jacob Bronowski (1908-1974) Polish-English humanist and mathematician
The Ascent of Man, Ep. 13 “The Long Childhood” (1973)
No fact in the world is instant, infinitesimal and ultimate, a single mark. There are, I hold, no atomic facts. In the language of science, every fact is a field — a crisscross of implications, those that lead to it and those that lead from it. We condense the laws around concepts. Science takes its coherence, its intellectual and imaginative strength together, from the concepts at which its laws cross, like knots in a mesh.
Jacob Bronowski (1908-1974) Polish-English humanist and mathematician
Science and Human Values, Part 3: “The Sense of Human Dignity”, §1 (1956)
Let us tenderly and kindly cherish therefore, the means of knowledge. Let us dare to read, think, speak and write.
John Adams (1735-1826) American lawyer, Founding Father, statesman, US President (1797-1801)
“A Dissertation on the Canon and Feudal Law” (1765)
Knowledge that tendeth but to satisfaction, is but as a courtesan, which is for pleasure, and not for fruit or generation.
Francis Bacon (1561-1626) English philosopher, scientist, author, statesman
“Valerius Terminus: Of the Interpretation of Nature”
A cheerful temper, joined with innocence will make beauty attractive, knowledge delightful, and wit good-natured.
Joseph Addison (1672-1719) English essayist, poet, statesman
The Tatler #192 (1 Jul 1710)
“Men, Pencroft, however learned they may be, can never change anything of the cosmographical order established by God Himself.”
“And yet,” added Pencroft, “the world is very learned. What a big book, captain, might be made with all that is known!”
“And what a much bigger book still with all that is not known!” answered Harding.
[Les hommes, Pencroff, si savants qu’ils puissent être, ne pourront jamais changer quoi que ce soit à l’ordre cosmographique établi par Dieu même.
— Et pourtant, ajouta Pencroff, qui montra une certaine difficulté à se résigner, le monde est bien savant! Quel gros livre, monsieur Cyrus, on ferait avec tout ce qu’on sait!
— Et quel plus gros livre encore avec tout ce qu’on ne sait pas, répondit Cyrus Smith.]Jules Verne (1828-1905) French novelist, poet, playwright
The Mysterious Island, Part 3, ch. 14 (1874)
(Source)
SIR BEDEVERE: How do know so much about swallows?
KING ARTHUR: Well, you have to know these things when you’re a king, you know.Monty Python (contemp.) British comedy troupe
Monty Python and the Holy Grail (1975)
I am an atheist, out and out. It took me a long time to say it. I’ve been an atheist for years and years, but somehow I felt it was intellectually unrespectable to say one was an atheist, because it assumed knowledge that one didn’t have. Somehow it was better to say one was a humanist or an agnostic. I finally decided that I’m a creature of emotion as well as of reason. Emotionally I am an atheist. I don’t have the evidence to prove that God doesn’t exist, but I so strongly suspect he doesn’t that I don’t want to waste my time.
Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
Free Inquiry (Spring 1982)
The desire of knowledge, like the thirst of riches, increases ever with the acquisition of it.
Laurence Sterne (1713-1786) Anglo-Irish novelist, Anglican clergyman
Tristam Shandy, Book 1, ch. 3 (1760-1767)
Every fact depends for its value on how much we already know.
Ralph Waldo Emerson (1803-1882) American essayist, lecturer, poet
Journal (1831)
If these writings of the Greeks agree with the book of God, they are useless and need not be preserved; if they disagree, they are pernicious and ought to be destroyed.
Umar I (c. 583-644) Arab caliph, jurist [Omar, Umar ibn Al-Khattāb, Al-Farooq]
(Attributed)
Ordering the burning of the Library of Alexandria in AD 641, as quoted in Edward Gibbon, The Decline and Fall of the Roman Empire (1776-88). The story is generally considered spurious. More discussion here. Alt. trans.: "They will either contradict the Koran, in which case they are heresy, or they will agree with it, so they are superfluous"
No one is more dangerous than someone who thinks he has “The Truth”. To be an atheist is almost as arrogant as to be a fundamentalist. But then again, I can get pretty arrogant.
Tom Lehrer (b. 1928) American mathematician, satirist, songwriter
Interview (June 1996)
When asked if he considered himself atheist or an agnostic.
The ink of the scholar is more sacred than the blood of the martyr.
Muhammad (570-632) Arabian merchant, prophet, founder of Islam [Mohammed]
Hadith
(Source)
In Syed Ameer Ali, A Critical Examination of the Life and Teachings of Mohammed (1873), cited to The Kitâb-ul-Mustarif, ch. 2, and The Mishkât, Bk 22, ch. 18, pt. 3 (from Abu Hurairah)
The good may prove to be a hidden form of evil. The evil may prove to be a new and not yet recognized form of the good.
Nikolai Alexandrovich Berdyaev (1874-1948) Russian religious and political philosopher
The Destiny of Man, 2.4.1 (1931) [tr. Duddington (1955)]
ANDREA: The aim of science is not to open the door to infinite wisdom, but to set some limit on infinite error.
Bertolt Brecht (1898-1956) German poet, playwright, director, dramaturgist
Life of Galileo [Leben des Galilei], sc. 13 (1939)
No one really starts anything new, Mrs Nemur. Everyone builds on other men’s failures. There is nothing really original in science. What each man contributes to the sum of knowledge is what counts.
Daniel F. Keyes (1927-2014) American author
Flowers for Algernon (novel) (1966)
If we cannot trust woman with the knowledge of her own body, then I claim that two thousand years of Christian teaching has proved to be a failure.
Margaret Sanger (1879-1966) American birth control activist, sex educator, nurse
“The Morality of Birth Control,” speech, Park Theatre, New York (18 Nov 1921)
(Source)
HAMLET: There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.William Shakespeare (1564-1616) English dramatist and poet
Hamlet, Act 1, sc. 5, l. 166 (1600)
If you have knowledge, let others light their candles in it.
Margaret Fuller (1810-1850) American journalist, critic, transcendentalist, reformer [Sarah Margaret Fuller Ossoli]
(Attributed)
Original citation unknown, but variants include: "If you have knowledge, let others light their candles at it" and "If you have knowledge, let others light their candles with it."
To spend more time in learning is better than spending more time in praying.
Muhammad (570-632) Arabian merchant, prophet, founder of Islam [Mohammed]
The Sayings of Muhammed, #277 [tr. Al-Suhrawardy (1941)]
Knowledge is happiness, because to have knowledge — broad, deep knowledge — is to know true ends from false, and lofty things from low. To know the thoughts and deeds that have marked man’s progress is to feel the great heart-throbs of humanity through the centuries; and if one does not feel in these pulsations a heavenward striving, one must indeed be deaf to the harmonies of life.
Helen Keller (1880-1968) American author and lecturer
The Story of My Life, pt. 1, ch. 20 (1903)
Man can learn nothing unless he proceeds from the known to the unknown.
Claude Bernard (1813-1878) French physiologist, scientist
Bulletin of New York Academy of Medicine, Vol. 4 (1928)
Science increases our power in proportion as it lowers our pride.
Claude Bernard (1813-1878) French physiologist, scientist
Bulletin of New York Academy of Medicine, Vol. 4 (1928)
There is nothing as stupid as an educated man if you get him off the thing he was educated in.
Will Rogers (1879-1935) American humorist
Weekly column (5 Jul 1931)
Every great study is not only an end in itself, but also a means of creating and sustaining a lofty habit of the mind.
Bertrand Russell (1872-1970) English mathematician and philosopher
“The Study of Mathematics,” Mysticism and Logic (1918)
(Source)
If we do not plant it [knowledge] when young, it will give us no shade when we are old.
Lord Chesterfield (1694-1773) English statesman, wit [Philip Dormer Stanhope]
Letter to his son (11 Dec 1747)
Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and yet always flying before them, becomes at once their sole torment and their sole happiness …. A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very significant fragments; and these fragments of universal truth are precisely what constitutes science.
Claude Bernard (1813-1878) French physiologist, scientist
An Introduction to the Study of Experimental Medicine [Introduction à l’Étude de la Médecine Expérimentale] (1865)
The evil that is in the world always comes of ignorance, and good intentions may do as much harm as malevolence, if they lack understanding. On the whole men are more good than bad; that, however, isn’t the real point. But they are more or less ignorant, and it is this that we call vice or virtue; the most incorrigible vice being that of an ignorance which fancies it knows everything and therefore claims for itself the right to kill. There can be no true goodness, nor true love, without the utmost clear-sightedness.
Albert Camus (1913-1960) Algerian-French novelist, essayist, playwright
The Plague (1947)
Generally speaking, everybody is reactionary on the subjects he knows about.
Robert Conquest (b. 1917) Anglo-American historian, diplomat, poet
“Conquest’s Law”
Attributed in Kingsley Amis, Memoirs (1991)
Variant: "Everyone is a reactionary about subjects he understands."
The means by which we live have outdistanced the ends for which we live. Our scientific power has outrun our spiritual power. We have guided missiles and misguided men.
Martin Luther King, Jr. (1929-1968) American clergyman, civil rights leader, orator
Strength to Love, 7.3 (1963)
From principles is derived probability, but truth or certainty is obtained only from facts.
Jesse Olney (1798-1872) American geographer, educator, politician
In Godwin, The National Preceptor, Lesson 85 “Select Sentences,” rule #19 (1830)
And whereas sense and memory are but knowledge of fact, which is a thing past and irrevocable, science is the knowledge of consequences, and dependence of one fact upon another; by which, out of that we can presently do, we know how to do something else when we will, or the like, another time: because when we see how anything comes about, upon what causes, and by what manner; when the like causes come into our power, we see how to make it produce the like effects.
