A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).
However beautiful the strategy, you should occasionally look at the results.
-- Winston Churchill
I have met people who exaggerate the differences [between the morality of different cultures], because they have not distinguished between differences of morality and differences of belief about facts. For example, one man said to me, "Three hundred years ago people in England were putting witches to death. Was that what you call the Rule of Human Nature or Right Conduct?" But surely the reason we do not execute witches is that we do not believe there are such things. If we did-if we really thought that there were people going about who had sold themselves to the devil and received supernatural powers from him in return and were using these powers to kill their neighbours or drive them mad or bring bad weather, surely we would all agree that if anyone deserved the death penalty, then these filthy quislings did. There is no difference of moral principle here: the difference is simply about matter of fact. It may be a great advance in knowledge not to believe in witches: there is no moral advance in not executing them when you do not think they are there. You would not call a man humane for ceasing to set mousetraps if he did so because he believed there were no mice in the house.
-C.S. Lewis
The kind of epistemology that allows you to be that certain about something so false is immoral.
To wit: http://www.youtube.com/watch?v=L5cFKpjRnXE&feature=player_embedded
Bad weather, as in 'rain that rots your crops and causes famine', 'wind that takes the roof off your house', 'blizzards that kill your livestock', etc...
I suspect that 300 days of sleet might have an effect, even now.
You want to learn from experience, but you want to learn from other people’s experience when you can.
Warren Buffett
The only man I know who behaves sensibly is my tailor; he takes my measurements anew each time he sees me. The rest go on with their old measurements and expect me to fit them.
-- George Bernard Shaw, writer, Nobel laureate (1856-1950)
Edit: The full citation is to his 1903 play Man and superman: a comedy and a philosophy, where the character John Tanner ("M.I.R.C., Member of the Idle Rich Class") says:
Yes, because to be treated as a boy was to be taken on the old footing. I had become a new person ; and those who knew the old person laughed at me. The only man who behaved sensibly was my tailor : he took my measure anew every time he saw me, whilst all the rest went on with their old measurements and expected them to fit me.
[I]n my opinion nothing occurs contrary to nature except the impossible, and that never occurs.
-- Sagredo, "Two New Sciences" (1914 translation), Galileo Galilei
Okay, I'm over my quota, but I really have to reproduce this from an ensuing discussion between myself and Michael Vassar, in which Michael Vassar commented that Galileo seemed to have accomplished his feats through character traits other than ultra-high-g:
"Wait, I just called myself 'not that smart, like Galileo'. What does that do to my Crackpot Index?!" -- Michael Vassar
A great many years ago, a couple of Jehovah Witnesses bit off more than they could chew with my grandmother. During the unsolicited conversation one of them remarked, "Only God can make a rainbow". To which my grandmother-who was watering her plants at the time-said, "Nonsense!", and created her own rainbow with a spray of water from the hose. Family lore has it that was the end of the conversation.
-- seen on Livejournal
When things are hard to understand, people who suspect they're nonsense generally keep quiet.
-- Paul Graham
"There is a superstition in avoiding superstition, when men think to do best if they go furthest from the superstition formerly received."
-- Francis Bacon
People often lack the discipline to adhere to a superior strategy that doesn't "feel" right. Reasoning in a way that sometimes "feels" wrong takes discipline.
-- Michael Bishop, Epistemology and the psychology of human judgement
Moral language persuades best when opinions are not yet formed, which is why writers of children’s literature can get away with saying things like, “Mr. Billings was an awful, horrible man with a heart of stone.” This sounds like a line from a children’s book because it employs persuasive methods that, though appropriate for children, would insult the intelligence of most adult readers.Most moral discourse is the conversational equivalent of children’s literature. Disputants speak to one another—or, rather, at one another—as if their interlocutors failed to pay adequate attention on the day elementary morality was explained. Unaware of the projective nature of value, they marvel at their opponents’ blindness, their utter failure to see what is so perfectly obvious. Not knowing what else to do, they scold their opponents as if they were children, and scold them as if they were belligerent children when they fail to respond the first time.
What to do about this? Take a cue from good writers. Stick to the facts. Keep evaluative language to a minimum, and get rid of the most overtly judgmental, moralistic language.
-- Joshua Greene, The Terrible, Horrible, No Good, Very Bad Truth About Morality And What To Do About It
"Everything is open to questioning. That does not mean all answers are equally valid."
-- Kelvin Throop
"Thus Aristotle laid it down that a heavy object falls faster than a light one does. The important thing about this idea is not that he was wrong, but that it never occurred to Aristotle to check it." Albert Szent-Györgyi de Nagyrápolt, winner of the Nobel Prize in Physiology or Medicine.
A good point - but also note that, when Galileo argued against Artistotelian physics in his Dialogue Concerning the Two Chief World Systems, he set forth instead the idea of the inertial reference frame - but Galileo also never felt the need to perform an experiment to verify that his shipboard "experiments" would work as he predicted. Both the wrong conclusion, and the right conclusion, were arrived at via thought-experiment. And when Einstein took the next step by proposing the special theory of relativity, that too was a thought-experiment with no validation.
It does not matter how frequently something succeeds if failure is too costly to bear. —Nicholas Nassim Taleb
(i.e.: don't forget to put, in your utility functions, the damn appropriate weight of those highly-improbable-but-high-negative-impact tragedies!)
Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as not to be beaten, and to be burned is not the same as not to be burned. —Avicenna (980–1037 AD)
There is an unfortunate optical illusion - a variant on the Doppler effect - that besets all frauds. It's unfortunate, because it has the effect of exacerbating the pecuniary losses that fraud victims endure, by unfairly leaving them, like many rape victims, irrationally ashamed of themselves.
The Doppler principle we posit holds that as a victim approaches a swindler, he sees nothing but green lights. But as soon as he realizes that his money is gone, he spins around and beholds, as if by magic, bright red flags as far as the eye can see.
-- Roger Parloff, senior editor, "More brazen than Madoff?", Fortune, 2009-03-31
Since all things related to akrasia and self motivation are relevant here:
"As a final incentive before giving up a difficult task, try to imagine it successfully accomplished by someone you violently dislike." -K. Zenios
The master mathematician sat in his private room and pushed the papers from him. His calculations were already finished. In a small white phial there still remained a little of the drug that had kept him awake and active for four long nights. Each day, serene, explicit, patient as ever, he had given his lecture to his students, and then had come back at once to this momentous calculation. His face was grave, a little drawn and hectic from his drugged activity. For some time he seemed lost in thought. Then he went to the window, and the blind went up with a click. Half way up the sky, over the clustering roofs, chimneys and steeples of the city, hung the star.
He looked at it as one might look into the eyes of a brave enemy. "You may kill me," he said after a silence. "But I can hold you--and all the universe for that matter--in the grip of this little brain. I would not change. Even now."
-- H.G. Wells, "The Star", 1897
"Whoso wishes to grasp God with his intellect becomes an atheist."
--Nikolaus Ludwig von Zinzendorf
(M. Aug. Gottlieb Spangenbergs Apologetische Schluß-Schrift (Leipzig and Görlitz, 1752; http://berlin.wolf.ox.ac.uk/lists/quotations/quotations_by_ib.html )
...When I became convinced that the Universe is natural — that all the ghosts and gods are myths, there entered into my brain, into my soul, into every drop of my blood, the sense, the feeling, the joy of freedom. The walls of my prison crumbled and fell, the dungeon was flooded with light, and all the bolts, and bars, and manacles became dust. I was no longer a servant, a serf, or a slave. There was for me no master in all the wide world — not even in infinite space. I was free — free to think, to express my thoughts — free to live to my own ideal — free to live for myself and those I loved — free to use all my faculties, all my senses — free to spread imagination’s wings — free to investigate, to guess and dream and hope — free to judge and determine for myself — free to reject all ignorant and cruel creeds, all the “inspired” books that savages have produced, and all the barbarous legends of the past — free from the popes and priests — free from all the “called” and “set apart” — free from sanctified mistakes and holy lies — free from the fear of eternal pain — free from the winged monsters of the night — free from devils, ghosts, and gods. For the first time I was free. There wer
"Experience does not ever err, it is only your judgement that errs in promising itself results which are not caused by your experiments."
Leonardo Da Vinci
Never underestimate the difficulty of changing false beliefs by facts. —Harvard economist Henry Rosovsky
A behavioral policy based on an inside strategy permits the alcoholic to sit at the bar and rehearse the reasons to abstain. An outside strategy identifies a principle or rule of conduct that produces the most accurate or desirable available outcome, and sticks to that rule despite the subjective pull to abandon the principle. A behavioral policy based on an outside strategy recommends that you avoid the bar in the first place.
-- Michael Bishop, 50 Years of Successful Predictive Modeling Should Be Enough: Lessons for Philosophy of Science
I've never seen a UFO. When I went to places that were rumored to be haunted, nothing showed up. Two hours of intense staring didn't make my pencil move a single millimeter, and glaring at my classmate's head didn't reveal his thoughts to me, either. I couldn't help but get depressed at how normal the laws of physics were.
-- Kyon, The Melancholy of Suzumiya Haruhi
"A theory which cannot be mortally endangered cannot be alive."
W. A. H. Rushton, quoted in J.R. Platt, "Strong Inference", Science vol.146, n.3642, 1964.
The script:
A grad student in humanities has been called before a hearing to justify his existence.
Student: "It's hard to explain monetarily, but how can you put a price tag on the human soul?"
Student: "The humanities help us appreciate beauty and grow as individuals."
Student: "What good are science and technology if we don't ask ourselves the question, what does it mean to be a human being?"
Chair: "So how's the answer coming along?"
Student: "Oh no, we just ask the question, not actually answer it."
Besides porking (really) hot babes, flipping out, wailing on guitars, and cutting off heads, a ninja has to train. They have to meditate ALL THE TIME. But most importantly, each morning a ninja should think about going a little crazier than the day before. Beyond thinking about going berserk, a ninja must, by definition, actually go berserk.
Robert Hamburger, REAL Ultimate Power, The Official Ninja Book
...The unwillingness to tolerate or respect any social forces which are not recognizable as the product of intelligent design, which is so important a cause of the present desire for comprehensive economic planning, is indeed only one aspect of a more general movement. We meet the same tendency in the field of morals and conventions, in the desire to substitute an artificial for the existing languages, and in the whole modern attitude toward processes which govern the growth of knowledge. The belief that only a synthetic system of morals, an artificial langu
Nothing sucks more than that moment during an argument when you realize you're wrong.
-- Unknown
That's a terrible quote. Being wrong is the best possible outcome of an argument, as it's the one with the highest expected knowledge gain (unless you're a hardcore altruist who doesn't value their own knowledge differently from anyone else's).
You are entitled to your own opinion, but you are not entitled to your own facts. —Daniel Moyniham
I won’t teach a man who is not eager to learn, nor will I explain to one incapable of forming his own ideas. Nor have I anything more to say to those who, after I have made clear one corner of the subject, cannot deduce the other three.
Confucius
Our minds are like inmates, captive to our biology, unless we manage a cunning escape.
-- Nassim Taleb
Dear Meg,
Please don't try to trisect the angle. . . It's not a matter of being clever.
Ian Stewart, Letters to a Young Mathematician
The public have an insatiable curiosity to know everything. Except what is worth knowing. Journalism, conscious of this, and having tradesman-like habits, supplies their demands. -Oscar Wilde
...MY mistress’ eyes are nothing like the sun
Coral is far more red than her lips’ red:
If snow be white, why then her breasts are dun;
If hairs be wires, black wires grow on her head.
I have seen roses damask’d, red and white,
But no such roses see I in her cheeks;
And in some perfumes is there more delight
Than in the breath that from my mistress reeks.
I love to hear her speak, yet well I know
That music hath a far more pleasing sound:
I grant I never saw a goddess go,—
My mistress, when she walks, treads on the ground:
And yet, by heaven, I think my love as rare
What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so. —Mark Twain
You must engage in these internal dialogues all the time, and you must let yourself lose the arguments gracefully. Writing may be a game of solitaire, but it isn’t a game at which you can cheat.
-Theodore Cheney, Getting the Words Right
There are two mistakes one can make along the road to truth…not going all the way, and not starting.
Buddha
"Now I'll never know if I was right."
-- final words of Adric, in Dr. Who, "Earthshock", on realizing that he's about to crash into the Earth
Mathematics is rational, not reasonable.
-- Terry Padden, in "Ultimately, in Physics the Rational shall become Reasonable!"
You got to have a dream,
If you don't have a dream,
How you gonna have a dream come true?
"My interest is in the future because I am going to spend the rest of my life there."
Charles F. Kettering
"Why then 'tis none to you; for there is nothing either good or bad, but thinking makes it so."
Hamlet Act 2, scene 2, 239–251
Why is it believed that what pictures you can make in your head, and what is true or necessarily true, are terribly well connected? If there is not a substantial connection between the (necessarily) true and your conception of the (necessarily) true, then Hume's argument goes up in smoke.
-- Aretae
[This is not a quote, but a meta discussion.]
I find it curious that the quotes posted here have higher votes on average than the usual discussion comments, and it makes me think that I have a below-average appreciation for quotations. Why do people value them, I wonder?
This is the moment that matters, and I refuse to look back on this day and say "maybe if I hadn't..."
"Do you really mean to tell me that back in Berlin you've got a plan for war against France and one for war against France and England and one for war against France and England and Russia and one for-"
"Aber naturlich," [But naturally] Schlieffen broke in. "And we think of also Austria-Hungary and Italy, though they are now our friend. And we remember Holland and Belgium and Denmark and Sweden and Turkey and-"
The general-in-chief of the United States stared at him. "Jesus Christ, you do mean it," Rosecrans said slowl...
"People are not base animals, but people, about 90% animal and 10% something new and different. Religion can be looked on as an act of rebellion by the 90% animal against the 10% new and different (most often within the same person)."
That way of looking at it is attractive but I don't think it is accurate. Most of religion is the outcome of that extra 10% and definitely part of what we identify as 'person'. Rejecting religion, and other equivalent institutions is an act of rebellion of 2% against the other 8%.
...The carting of manure had to begin earlier, so that everything would be finished before the early mowing. The far field had to be ploughed continually, so as to keep it fallow. The hay was to be got in, not on half shares with the peasants, but by hired workers.
The steward listened attentively and obviously made an effort to approve of the master's suggestions; but all the same he had that hopeless and glum look, so familiar to Levin and always so irritating to him. This look said: "That's all very well, but it's as God grants."
Nothing so upset
In volunteer organizations, when someone was allowed to fail to teach them a lesson about their responsibilities, I do not ever remember them learning that lesson.
-- Matt Arnold
(approximate, my translation)
Blessed are those who believe without seeing. Who wants to be blessed when they could see.
-- Esa Lappi, my high school math teacher when showing us the proof of some theorem.
Lies!
Blessed just gives you a +1 to attack while sight gives you 2 AC, half speed, -4 search, automatically failed spot checks and the 50% miss chance on every attack from total concealment!
...The statement that all of us are purportedly able to coherently conceive or imagine a certain situation - for instance, an imitation man or a zombie - is rather trivial from a philosophical point of view because ultimately it is just an empirical claim about the history of the brain and its functional architecture. It is a statement about a world that is phenomenally possible for human beings. It is not a statement about the modal strength of the relationship between physical and phenomenal properties; logical possibility (or necessity) is not implied by
The intensity of a conviction that a hypothesis is true has no bearing on whether it is true or false. The importance of the strength of our conviction is only to provide a proportionately strong incentive to find out if the hypothesis will stand up to critical evaluation.
— Peter Medawar
Science attempts to find logic and simplicity in nature. Mathematics attempts to establish order and simplicity in human thought.
— Edward Teller
And when one goeth through fire for his teaching--what doth that prove? Verily, it is more when one's teaching cometh out of one's own burning!
-Friedrich Nietzsche, The Antichrist
the human mind is trained by the knowledge imparted to it and the direction given to its ideas. Only what is great can make it great; the little can only make it little.
-Carl von Clausewitz
The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.
William Lawrence Bragg
"The demand for immortality is nowadays essentially teleological. We believe ourselves immortal because we believe ourselves fit for immortality. A 'substance' ought to perish we think, if not worthy to survive, and an insubstantial 'stream' to prolong itself where worthy, if the nature of Things is organized in the rational way we trust it is."
--William James, "The Consciousness of Self", The Principles of Psychology
...It seems thus impossible that any question about the nature or character of particular sensory qualities should ever arise which is not a question about the differences from (or relations to) other sensory qualities; and the extent to which the effects of its occurrence differ from the effects of the occurrence of any other qualities determines the whole of its character.
To ask beyond this for the explanation of some absolute attribute of sensory qualities seems to be to ask for something which by definition cannot manifest itself in any differences in th
Mathematics is rational, not reasonable.-- Terry Padden, Ultimately, in Physics the Rational shall become Reasonable !
"Although blinding with science can be used in any argument, many will recognize the special domain of this fallacy as the subjects which like to consider themselves as sciences, but are not.
Science deals with things from atoms to stars at a level where individual differences do not matter. The scientist talks of 'all' rolling bodies or whatever, and formulates general laws to test by experiment.
The trouble with human beings is that, unlike rolling bodies, the individual differences do matter. Often, again unlike rolling bodies, they want to do differ...
I checked Aristotle's 'On the Heavens' and 'Physics'. Nowhere could I find him saying that a heavy object falls faster than a light one. Aren't it the Aristotelian scholars who said that and who are to blame? Aristotle distinguished relative weight (our mass) and absolute weight (our mass density) and gives practical examples to check that denser objects move faster downwards in water than less dense objects, if the objects have the same shape.
Aristotle really said it, in Heavens 4.2:
Note that he take the extreme position that heavier objects fall faster, not just denser! This claim is robust against translation errors since he is keeping the material fixed. I have not been able to find the passa... (read more)