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While the dogmatist is harmful, the sceptic is useless ...; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or of ignorance. Knowledge is not so precise a concept as is commonly thought. Instead of saying 'I know this', we ought to say 'I more or less know something more or less like this'. ... Knowledge in practical affairs has not the certainty or the precision of arithmetic.
Bertrand RussellThe propositions of mathematics have, therefore, the same unquestionable certainty which is typical of such propositions as "All bachelors are unmarried," but they also share the complete lack of empirical content which is associated with that certainty: The propositions of mathematics are devoid of all factual content; they convey no information whatever on any empirical subject matter.
Carl Gustav HempelWhile denial leads to certainty, it is only the certainty of death. This is true for individuals and also for civilizations.
Graciela ChichilniskyThe only difference between causation and the value is that the word "cause" implies absolute certainty whereas the implied meaning of "value" is one of preference. In classical science it was supposed that the world always works in terms of absolute certainty and that "cause" is the more appropriate word to describe it. But in modern quantum physics all that is changed. Particles "prefer" to do what they do. An individual particle is not absolutely committed to one predictable behavior. What appears to be an absolute cause is just a very consistent pattern of preferences.
Robert M. PirsigThe very foundation of science is to keep the door open to doubt. Precisely because we keep questioning everything, especially our own premises, we are always ready to improve our knowledge. Therefore a good scientist is never โcertainโ. Lack of certainty is precisely what makes conclusions more reliable than the conclusions of those who are certain: because the good scientist will be ready to shift to a different point of view if better elements of evidence, or novel arguments emerge. Therefore certainty is not only something of no use, but is in fact damaging, if we value reliability.
Carlo RovelliThe rocket that goes up next March will not only lift a payload, it will launch what I believe will ultimately be the most significant commercial space facility in the country, ... This launch will be a brilliant signal flare that will let the nation and the world know New Mexico's spaceport is open for business. We can now say with certainty that the dream of this spaceport launching a new era in New Mexico's aerospace industry will become reality.
Bill RichardsonDoubt is nothing but a trivial agitation on the surface of the soul, while deep down there is a calm certainty.
Francois MauriacThere are few times when we know with absolute certainty we are going to do something for the last time. Life has a way of moving in circles, bringing us back to places we didnโt expect and taking us away from those we do. There are too many times we donโt pay close enough attention, and moments are lost in our assumption weโll have another chance.
Megan HartGenius is neither learned nor acquired. It is knowing without experience. It is risking without fear of failure. It is perception without touch. It is understanding without research. It is certainty without proof. It is ability without practice. It is invention without limitations. It is imagination without boundaries. It is creativity without constraints. It is...extraordinary intelligence!
Patricia PolaccoAnd when I hear it said that God is good and He will pardon us, and then see that men cease not from evil-doing, oh, how it grieves me! The infinite goodness with which God communicates with us, sinners as we are, should constantly make us love and serve Him better; but we, on the contrary, instead of seeing in his goodness an obligation to please Him, convert it into an excuse for sin which will of a certainty lead in the end to our deeper condemnation.
Catherine of GenoaHe wondered how he could ever have thought of the planets, even of the Earth, as islands of life and reality floating in a deadly void. Now with a certainty which never after deserted him, he saw the planets - as mere holes or gaps in the living heaven - excluded and rejected wastes of heavy matter and murky air, formed not by addition to, but by subtraction from, the surrounding brightness.
C. S. LewisA habit of basing convictions upon evidence, and of giving to them only that degree or certainty which the evidence warrants, would, if it became general, cure most of the ills from which the world suffers.
Bertrand RussellJust as the spectroscope opened up a new astronomy by enabling the astronomer to determine some of the constituents of which distant stars are composed, so the seismograph, recording the unfelt motion of distant earthquakes, enables us to see into the earth and determine its nature with as great a certainty, up to a certain point, as if we could drive a tunnel through it and take samples of the matter passed through.
Richard Dixon OldhamI know with certainty, that [an honest man] is not to put his hand into the fire, and hold it there, till it be consumed: And thisevent, I think I can foretell with the same assurance, as that, if he throw himself out at the window, and meet with no obstruction, he will not remain a moment suspended in the air.
David HumeOh, the truth, oh yeah, lot of trouble that got us into, didn't it, over the last maybe thousand years? Hitler knew the truth, so did Stalin, so did Mao Zedong, so did the Inquisition. They all knew the truth and that caused such horror. Certainty is the enemy.
Anthony HopkinsBiblical hope is not wishful thinking or an optimistic outlook; rather, it is a confident expectation based on the certainty of God's Word that as He has anchored us in the past, so He will in the future.
David WilkersonWho is so brave and so noble that they could hurl themselves at infinity without any question, with complete trust and complete certainty that that infinity will destroy them forever?
Frederick LenzThe abuse of the veto power has become so predictable that frequently resolutions are not even tabled because of the certainty of a veto against their adoption. Necessary discussion is thereby suppressed. Concerted action by the Security Council, the General Assembly and other United Nations agencies is necessary to prevent major human rights violations, stop ongoing breaches and provide remedies to victims.
Alfred-Maurice de ZayasLove must neither beg nor demand. Love must be strong enough to find certainty within itself. It then cease to be moved and becomes the mover.
Hermann HesseIt's true that a dangerous combination of certainty and ignorance often shows up around sex and consent on campus. People on all sides of the issue have such strong feelings about it that they're blinded to the facts.
Vanessa Grigoriadis"What is the meaning of life?" This question has no answer except in the history of how it came to be asked. There is no answer because words have meaning, not life or persons or the universe itself. Our search for certainty rests in our attempts at understanding the history of all individual selves and all civilizations. Beyond that, there is only awe.
Julian JaynesWhen we started, I was delivering meals to people in Atlanta. We were a direct-care organization. And it was - people needed meals, they needed transport, they needed medication, they needed buddy systems. They had a death sentence. There was AZT, and that was just prolonging the agony, basically. Now people, of course, if they are on antiretrovirals, they face a lifetime of health, basically. I mean, it doesn't - it's I would say in the 99 percent certainty bracket that if you are on that medication, you will have a healthy life.
Elton JohnI do not despise genius-indeed, I wish I had a basketful of it. But yet, after a great deal of experience and observation, I have become convinced that industry is a better horse to ride than genius. It may never carry any man as far as genius has carried individuals, but industry-patient, steady, intelligent industry-will carry thousands into comfort, and even celebrity; and this it does with absolute certainty.
Walter LippmannTo teach how to live without certainty and yet without being paralysed by hesitation is perhaps the chief thing that philosophy, in our age, can do for those who study it.
Bertrand RussellAlmost all religions provide opportunities for human beings to convince themselves of their own righteousness, to speak in the name of God, and even to go to war on God's behalf. This 'blasphemy of certainty' is also rife among secularists who in their case have not God but science or the proletariat on their side.
Stephen ProtheroOne can re-create what was in the mind of a mathematician a thousand years ago, recapture the truth of the intellect wherever it may have once come to light; but the image of art, that infinite variable of perception and expression in the individual, - that is not easily re-created, at least, not with certainty and in its original fulness.
George Edward WoodberryHe'd gone to Louddon's fortress to take Madelyne captive. His plan was revenge; an eye for an eye. And that had been reason enough. Until she'd warmed his feet. Everything had changed at that moment. Duncan had known with a certainty he couldn't deny that they were henceforth bound together. He could never let her go.
Julie GarwoodI love you," he said. "You're more dear to my heart than I ever knew anyone else can be. And I've made you cry; and there I'll stop." She was crying, but not because of his words. It was because of a certainty she refused to consider while she sat before him.
Kristin CashoreI found it peculiar that those who wanted to take military action could - with 100 per cent certainty - know that the weapons existed and turn out to have zero knowledge of where they were.
Hans BlixThere are no means of attaining faith and certainty except through the Qur'an.
Ibn Qayyim Al-JawziyyaThe point is that petty, frustrating crap like this is exactly where the work of choosing comes in. Because the traffic jams and crowded aisles and long checkout lines give me time to think, and if I don't make a conscious decision about how to think and what to pay attention to, I'm going to be pissed and miserable every time I have to food-shop, because my natural default-setting is the certainty that situations like this are really all about me, about my hungriness and my fatigue and my desire to just get home.
David Foster WallaceWhen you meditate you feel joy, harmony, peace, stillness, ecstasy, laughter, certainty, courage, strength, awareness and immortality. In the beginning you will feel these things vaguely, a distant knocking at your castle door.
Frederick LenzThe root of suffering is resisting the certainty that no matter what the circumstances, uncertainty is all we truly have.
Pema ChodronWisdom is not finally tested in schools, Wisdom cannot be pass'd from one having it to another not having it, Wisdom is of the soul, is not susceptible of proof, is its own proof, Applies to all stages and objects and qualities and is content, Is the certainty of the reality and immortality of things, and the excellence of things; Something there is in the float of the sight of things that provokes it out of the soul.
Walt WhitmanIdeas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together
Hermann EbbinghausIt is terribly important to realize that the leap of faith is not so much a leap of thought as of action. For while in many matters it is first we must see then we will act; in matters of faith it is first we must do then we will know, first we will be and then we will see. One must, in short, dare to act wholeheartedly without absolute certainty.
William Sloane CoffinThe only certainty is that we never know what tomorrow holds. We live for today, life is short, so let's enjoy it together while we can.
JinxxI sat there beside him till morning - and as I watched his face in the starlight, then the first ray of the sun on his untroubled forehead and closed eyelids, what I experienced was not a prayer, I do not pray, but that state of spirit at which a prayer is a misguided attempt: a full, confident, affirming self-dedication to my love of the right, to the certainty that the right would win and that this boy would have the kind of future he deserved... I did not expect it to be as great as this - or as hard.
Ayn RandProbability is not a mere computation of odds on the dice or more complicated variants; it is the acceptance of the lack of certainty in our knowledge and the development of methods for dealing with our ignorance.
Nassim Nicholas Taleb