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Recent Feedback
- 20-Mar-20 - Post, alt.fan.pratchett (14 Jun 1998) | WIST on (Attributed).
- 16-Mar-20 - Quoted in Washington Post (23 Dec 1973) | WIST on (Attributed).
- 4-Mar-20 - (Attributed) | WIST on Walden (1854).
- 24-Feb-20 - "Pushkin and Pugachev [Пушкин и Пугачев]" (1937) | WIST on (Attributed).
- 22-Feb-20 - Defending Health Freedom: from informed-consent to implied consent – Nature of Healing on Letter to Henry L. Sprague (26 Jan 1900).
- 12-Feb-20 - "What I Believe," The Nation (16 Jul 1938) | WIST on Letter to Bp. Mandell Creighton (3 Apr 1887).
Quotations about uncertainty
Note that not all quotations have been tagged, so the Search function may find additional quotations on this topic.
So we have to make guesses in order to give any utility at all to science. In order to avoid simply describing experiments that have been done, we have to propose laws beyond their observed range. There is nothing wrong with that, despite the fact that it makes science uncertain. If you thought before that science was certain — well, that is just an error on your part.
Richard Feynman (1918-1988) American physicist
The Character of Physical Law, ch. 3 “The Great Conservation Principles” (1965)
(Source)
Warped with satisfactions and terrors, woofed with too many ambiguities and too few certainties, life can be lived best not when we have the answers — because we will never have those — but when we know enough to live it right out to the edges, edges sometimes marked by other people, sometimes showing only our own footprints.
Rosalie Maggio (contemp.) American writer
The New Beacon Book of Quotations by Women, Introduction (1996)
Ah, what a dusty answer gets the soul
When hot for certainties in this our life!
Men become civilized not in proportion to their willingness to believe but in proportion to their readiness to doubt.
H.L. Mencken (1880-1956) American writer and journalist [Henry Lewis Mencken]
“What I Believe,” sec. 4, Forum and Century (Sep 1930)
(Source)
Suspicion begets suspicion.
Publilius Syrus (d. 42 BC) Assyrian slave, writer, philosopher [less correctly Publius Syrus]
Sententiae [Moral Sayings], # 928 [tr. Lyman (1862)]
The ignorance of even the best-informed investor about the more remote future is much greater than his knowledge, and he cannot but be influenced to a degree which would seem wildly disproportionate to anyone who really knew the future, and be forced to seek a clue mainly here to trends further ahead. But if this is true of the best-informed, the vast majority of those who are concerned with the buying and selling of securities know almost nothing whatever about what they are doing. They do not possess even the rudiments of what is required for a valid judgement, and are the prey of hopes and fears easily aroused by transient events and as easily dispelled.
John Maynard Keynes (1883-1946) English economist
A Treatise on Money, Vol. 2 (1930)
God offers to every mind its choice between truth and repose. Take which you please — you can never have both.
Ralph Waldo Emerson (1803-1882) American essayist, lecturer, poet
“Intellect,” Essays: First Series (1841)
(Source)
Rash indeed is he who reckons on the morrow, or haply on days beyond it; for tomorrow is not, until today is past.
Sophocles (496-406 BC) Greek tragic playwright
Trachiniae, l. 943
Hope for the best.
Expect the worst.
The world’s a stage.
We’re unrehearsed.
Mel Brooks (b. 1926) American comedic actor, writer, producer [b. Melvyn Kaminsky]
The Twelve Chairs, “Hope for the Best, Expect the Worst”, chorus (1970)
Once you get it into your head that somebody is controlling events, you can interpret everything in that light and find no reasonable certainty anywhere.
Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
Foundation’s Edge, ch. 12 “Agent” (1982)
The best advice I’ve ever received is, “No one else knows what they’re doing either.”
There are many fine things which you mean to do some day, under what you think will be more favorable circumstances. But the only time that is surely yours is the present, hence this is the time to speak the word of appreciation and sympathy, to do the generous deed, to forgive the fault of a thoughtless friend, to sacrifice self a little more for others. Today is the day in which to express your noblest qualities of mind and heart, to do at least one worthy thing which you have long postponed, and to use your God-given abilities for the enrichment of some less fortunate fellow traveler. Today you can make your life big, broad, significant and worthwhile. The present is yours to do with it as you will.
Grenville Kleiser (1868-1953) Canadian-American self-help author
Inspiration And Ideals: Thoughts For Every Day, “August Twenty-Eighth” (1918 ed.)
So as this only point among the rest remaineth sure and certain, namely, that nothing is certain.
Pliny the Elder (AD 23-79) Roman author, naturalist, philosopher, military commander [Gaius Plinius Secundus]
Natural History, Book 2, ch. 7 (AD 77-79)
Inspect every piece of pseudoscience and you will find a security blanket, a thumb to suck, a skirt to hold. What does the scientist have to offer in exchange? Uncertainty! Insecurity!
Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
Asimov’s Guide to Science (1972)
I’m not really rich. I’m something far more noble I’m a job creator. [Heavenly chorus] Sort of the same way Patagonian tooth-fish became Chilean sea-bass. [Heavenly chorus] But y’know what, just by suggesting, just by bringing it up, that he is going to tax me more, Comrade Obama has created an atmosphere of uncertainty that makes me skittish about creating more jobs, yeah, I have been so freaked out that today at breakfast I could barely butter my gold. You see, you poor people, you don’t get how much “uncertainty” gives us job creators the willies. It’s terrifying — like when you find out your private island has natives; or when your wife notices the maid’s kid looks just like you; or when the limo driver tries to start a conversation. So tax me at a higher rate if you like, you’re practically firing yourselves. Because I’ll tell you something, I have been so shitting in my pants about this uncertainty thing, that yesterday I let go a dozen essential workers at my compound, including my Tivo programmer, my manscaper, the liposuctionist, my gardener’s personal trainer, my dog whisperer, the lookalike I hired to foil assassination attempts, my private farmer, the lady who dispenses hand sanitizer after our pre-show prayer circle, the girl I pay to mistake me for Jon Hamm, and the guy who takes care of the shark tank. Which reminds me, I’m gonna have to let go two sharks!
William "Bill" Maher (b. 1956) American comedian, political commentator, critic, television host.
Real Time with Bill Maher (23 Sep 2011)
Look, I tried the cat experiment. On the third trial, the cat was dead. On each of the subsequent 413 trials, it remained dead. Am I doing something wrong?
James Nicoll (b. 1961) Canadian reviewer, editor
“SCHRODINGER’S CAT??” sci.physics, Usenet (11 Mar 1992)
(Source)
When thinking about life, remember this: no amount of guilt can change the past, and no amount of anxiety can change the future.
Other Authors and Sources
Anonymous
The Road goes ever on and on
Down from the door where it began.
Now far ahead the Road has gone,
And I must follow, if I can,
Pursuing it with eager feet,
Until it joins some larger way,
Where many paths and errands meet.
And whither then? I cannot say.J.R.R. Tolkien (1892-1973) English writer, fabulist, philologist, academic [John Ronald Reuel Tolkien]
The Lord of the Rings: The Fellowship of the Ring, Book 1, ch. 1 “A Long-expected Party” (1954)
(Source)
If ever there’s a tomorrow where we’re not together, there is something you must remember. You’re braver than you believe, and stronger than you seem, and smarter than you think.
A. A. Milne (1882-1956) English poet and playwright [Alan Alexander Milne]
(Misattributed)
(Source)
Christopher Robin to Pooh Bear. The quotation is broadly attributed to Milne and Winnie the Pooh, but is actually from the 1997 Disney video Pooh's Grand Adventure: The Search for Christopher Robin, written by Carter Crocker and Karl Geurs, based on the characters created by Milne.
In fact, the mere act of opening the box will determine the state of the cat, although in this case there were three determinate states the cat could be in: these being Alive, Dead, and Bloody Furious.
Terry Pratchett (1948-2015) English author
Lords and Ladies (1992)
The presence of those seeking the truth is infinitely to be preferred to the presence of those who think they’ve found it.
Terry Pratchett (1948-2015) English author
Monstrous Regiment (2003)
The great leaders of the people of God, like Moses, have always left room for doubt. You must leave room for the Lord, not for our certainties; we must be humble. Uncertainty is in every true discernment that is open to finding confirmation in spiritual consolation.
Francis I (b. 1936) Argentinian Catholic Pope (2013- ) [b. Jorge Mario Bergoglio]
Interview with Antonio Spadaro, America Magazine (30 Sep 2013)
(Source)
Religion consists in a set of things which the average man thinks he believes and wishes he was certain of.
Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]
Mark Twain’s Notebook, 1879 [ed. Paine (1935)]
Moral certainty is always a sign of cultural inferiority. The more uncivilized a man, the surer he is that he knows precisely what is right and what is wrong. All human progress, even in morals, has been the work of men who have doubted the current moral values, not of men who have whooped them up and tried to enforce them. The truly civilized man is always skeptical and tolerant in this field as in all others. His culture is based on “I am not too sure.”
H.L. Mencken (1880-1956) American writer and journalist [Henry Lewis Mencken]
Minority Report : H.L. Mencken’s Notebooks (1956)
We cannot define anything precisely! If we attempt to, we get into that paralysis of thought that comes to philosophers who sit opposite each other, one saying to the other, “You don’t know what you are talking about!”. The second one says, “What do you mean by know? What do you mean by talking? What do you mean by you?” and so on.
Richard Feynman (1918-1988) American physicist
The Feynman Lectures on Physics, Volume I, 8-2 “Motion” (20 Oct 1961)
(Source)
Scientists take it for granted that it is perfectly consistent to be unsure — that it is possible to live and not know. But I don’t know whether everyone realizes that this is true.
Richard Feynman (1918-1988) American physicist
What Do You Care What Other People Think? (1988)
Too much positive is either scared or stupid or both. Reality is uncertain.
Robert B. Parker (1932-2010) American writer
Early Autumn (1981)
When you want to test the depths of a stream, don’t use both feet.
Other Authors and Sources
Chinese proverb
Doubt is not an agreeable condition, but certainty is an absurd one.
[Le doute n’est pas une condition agréable, mais la certitude est absurde.]
Voltaire (1694-1778) French writer [pseud. of Francois-Marie Arouet]
Letter to Frederick II of Prussia (6 Apr 1767)
Alt trans.
- "Doubt is not a pleasant condition, but certainty is absurd."
- "Doubt is not a very agreeable state, but certainty is a ridiculous one."
Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity.William Butler Yeats (1865-1939) Irish poet and dramatist
“The Second Coming,” l.1-8 (1920)
Worrying about something is like paying interest on a debt you don’t even know if you owe.
Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]
(Attributed)
Life is the art of drawing sufficient conclusions from insufficient premises.
Samuel Butler (1835-1902) English novelist, satirist, scholar
The Note-Books of Samuel Butler, ch. 1 “Life,” ix (1912)
Full text.
The longing for certainty and repose is in every human mind. But certainty generally is an illusion, and repose is not the destiny of man.
Oliver Wendell Holmes, Jr. (1841-1935) American jurist, Supreme Court Justice
“The Path of Law,” 10 Harvard Law Review 457 (1897)
(Source)
