Evidence Quotes

“There is nothing more deceptive than an obvious fact.”
― Arthur Conan Doyle, The Boscombe Valley Mystery - a Sherlock Holmes Short Story

“Extraordinary claims require extraordinary evidence.”
― Carl Sagan

“Tell people there's an invisible man in the sky who created the universe, and the vast majority will believe you. Tell them the paint is wet, and they have to touch it to be sure.”
― George Carlin

“Poetry is just the evidence of life. If your life is burning well, poetry is just the ash.”
― Leonard Cohen

“I like the scientific spirit—the holding off, the being sure but not too sure, the willingness to surrender ideas when the evidence is against them: this is ultimately fine—it always keeps the way beyond open—always gives life, thought, affection, the whole man, a chance to try over again after a mistake—after a wrong guess.”
― Walt Whitman, Walt Whitman's Camden Conversations

“The most confused you will ever get is when you try to convince your heart and spirit of something your mind knows is a lie.”
― Shannon L. Alder

“4. Religion. Your reason is now mature enough to examine this object. In the first place, divest yourself of all bias in favor of novelty & singularity of opinion... shake off all the fears & servile prejudices, under which weak minds are servilely crouched. Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blindfolded fear. You will naturally examine first, the religion of your own country. Read the Bible, then as you would read Livy or Tacitus. The facts which are within the ordinary course of nature, you will believe on the authority of the writer, as you do those of the same kind in Livy and Tacitus. The testimony of the writer weighs in their favor, in one scale, and their not being against the laws of nature, does not weigh against them. But those facts in the Bible which contradict the laws of nature, must be examined with more care, and under a variety of faces. Here you must recur to the pretensions of the writer to inspiration from God. Examine upon what evidence his pretensions are founded, and whether that evidence is so strong, as that its falsehood would be more improbable than a change in the laws of nature, in the case he relates. For example in the book of Joshua we are told the sun stood still several hours. Were we to read that fact in Livy or Tacitus we should class it with their showers of blood, speaking of statues, beasts, &c. But it is said that the writer of that book was inspired. Examine therefore candidly what evidence there is of his having been inspired. The pretension is entitled to your inquiry, because millions believe it. On the other hand you are astronomer enough to know how contrary it is to the law of nature that a body revolving on its axis as the earth does, should have stopped, should not by that sudden stoppage have prostrated animals, trees, buildings, and should after a certain time have resumed its revolution, & that without a second general prostration. Is this arrest of the earth's motion, or the evidence which affirms it, most within the law of probabilities? You will next read the New Testament. It is the history of a personage called Jesus. Keep in your eye the opposite pretensions: 1, of those who say he was begotten by God, born of a virgin, suspended & reversed the laws of nature at will, & ascended bodily into heaven; and 2, of those who say he was a man of illegitimate birth, of a benevolent heart, enthusiastic mind, who set out without pretensions to divinity, ended in believing them, and was punished capitally for sedition, by being gibbeted, according to the Roman law, which punished the first commission of that offence by whipping, & the second by exile, or death in fureâ.

...Do not be frightened from this inquiry by any fear of its consequences. If it ends in a belief that there is no God, you will find incitements to virtue in the comfort and pleasantness you feel in its exercise, and the love of others which it will procure you... In fine, I repeat, you must lay aside all prejudice on both sides, and neither believe nor reject anything, because any other persons, or description of persons, have rejected or believed it... I forgot to observe, when speaking of the New Testament, that you should read all the histories of Christ, as well of those whom a council of ecclesiastics have decided for us, to be Pseudo-evangelists, as those they named Evangelists. Because these Pseudo-evangelists pretended to inspiration, as much as the others, and you are to judge their pretensions by your own reason, and not by the reason of those ecclesiastics. Most of these are lost...

[Letter to his nephew, Peter Carr, advising him in matters of religion, 1787]”
― Thomas Jefferson, Letters of Thomas Jefferson

“If someone doesn't value evidence, what evidence are you going to provide to prove that they should value it? If someone doesn’t value logic, what logical argument could you provide to show the importance of logic?”
― Sam Harris

“What can be asserted without evidence can also be dismissed without evidence.”
― Christopher Hitchens, God Is Not Great: How Religion Poisons Everything

“People almost invariably arrive at their beliefs not on the basis of proof but on the basis of what they find attractive.”
― Blaise Pascal, De l'art de persuader

“The most preposterous notion that Homo sapiens has ever dreamed up is that the Lord God of Creation, Shaper and Ruler of all the Universes, wants the saccharine adoration of His creatures, can be swayed by their prayers, and becomes petulant if He does not receive this flattery. Yet this absurd fantasy, without a shred of evidence to bolster it, pays all the expenses of the oldest, largest, and least productive industry in all history.”
― Robert A. Heinlein, Time Enough for Love

“Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence.”
― John Adams, The Portable John Adams

“The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widely spread belief is more likely to be foolish than sensible.”
― Bertrand Russell, Marriage and Morals

“Tell a devout Christian that his wife is cheating on him, or that frozen yogurt can make a man invisible, and he is likely to require as much evidence as anyone else, and to be persuaded only to the extent that you give it. Tell him that the book he keeps by his bed was written by an invisible deity who will punish him with fire for eternity if he fails to accept its every incredible claim about the universe, and he seems to require no evidence what so ever.”
― Sam Harris, The End of Faith: Religion, Terror, and the Future of Reason

“We all know that any emotional bias -- irrespective of truth or falsity -- can be implanted by suggestion in the emotions of the young, hence the inherited traditions of an orthodox community are absolutely without evidential value.... If religion were true, its followers would not try to bludgeon their young into an artificial conformity; but would merely insist on their unbending quest for truth, irrespective of artificial backgrounds or practical consequences. With such an honest and inflexible openness to evidence, they could not fail to receive any real truth which might be manifesting itself around them. The fact that religionists do not follow this honourable course, but cheat at their game by invoking juvenile quasi-hypnosis, is enough to destroy their pretensions in my eyes even if their absurdity were not manifest in every other direction.”
― H.P. Lovecraft, Against Religion: The Atheist Writings of H.P. Lovecraft

“Don't you believe in flying saucers, they ask me? Don't you believe in telepathy? — in ancient astronauts? — in the Bermuda triangle? — in life after death?
No, I reply. No, no, no, no, and again no.
One person recently, goaded into desperation by the litany of unrelieved negation, burst out "Don't you believe in anything?"
Yes", I said. "I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.”
― Isaac Asimov

“In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.”
― David Hume, An Enquiry Concerning Human Understanding

“It's natural to think that living things must be the handiwork of a designer. But it was also natural to think that the sun went around the earth. Overcoming naive impressions to figure out how things really work is one of humanity's highest callings.

[Can You Believe in God and Evolution? Time Magazine, August 7, 2005]”
― Steven Pinker

“Faith, n. Belief without evidence in what is told by one who speaks without knowledge, of things without parallel.”
― Ambrose Bierce, The Unabridged Devil's Dictionary

“...What I have denied and what my reason compels me to deny, is the existence of a Being throned above us as a god, directing our mundane affairs in detail, regarding us as individuals, punishing us, rewarding us as human judges might.

When the churches learn to take this rational view of things, when they become true schools of ethics and stop teaching fables, they will be more effective than they are to-day... If they would turn all that ability to teaching this one thing – the fact that honesty is best, that selfishness and lies of any sort must surely fail to produce happiness – they would accomplish actual things. Religious faiths and creeds have greatly hampered our development. They have absorbed and wasted some fine intellects. That creeds are getting to be less and less important to the average mind with every passing year is a good sign, I think, although I do not wish to talk about what is commonly called theology.

The criticisms which have been hurled at me have not worried me. A man cannot control his beliefs. If he is honest in his frank expression of them, that is all that can in justice be required of him. Professor Thomson and a thousand others do not in the least agree with me. His criticism of me, as I read it, charged that because I doubted the soul’s immortality, or ‘personality,’ as he called it, my mind must be abnormal, ‘pathological,’ in other, words, diseased... I try to say exactly what I honestly believe to be the truth, and more than that no man can do. I honestly believe that creedists have built up a mighty structure of inaccuracy, based, curiously, on those fundamental truths which I, with every honest man, must not alone admit but earnestly acclaim.

I have been working on the same lines for many years. I have tried to go as far as possible toward the bottom of each subject I have studied. I have not reached my conclusions through study of traditions; I have reached them through the study of hard fact. I cannot see that unproved theories or sentiment should be permitted to have influence in the building of conviction upon matters so important. Science proves its theories or it rejects them. I have never seen the slightest scientific proof of the religious theories of heaven and hell, of future life for individuals, or of a personal God. I earnestly believe that I am right; I cannot help believing as I do... I cannot accept as final any theory which is not provable. The theories of the theologians cannot be proved. Proof, proof! That is what I always have been after; that is what my mind requires before it can accept a theory as fact. Some things are provable, some things disprovable, some things are doubtful. All the problems which perplex us, now, will, soon or late, be solved, and solved beyond a question through scientific investigation. The thing which most impresses me about theology is that it does not seem to be investigating. It seems to be asserting, merely, without actual study.

...Moral teaching is the thing we need most in this world, and many of these men could be great moral teachers if they would but give their whole time to it, and to scientific search for the rock-bottom truth, instead of wasting it upon expounding theories of theology which are not in the first place firmly based. What we need is search for fundamentals, not reiteration of traditions born in days when men knew even less than we do now.

[Columbian Magazine interview]”
― Thomas A. Edison

“...Whilst on board the Beagle I was quite orthodox, and I remember being heartily laughed at by several of the officers... for quoting the Bible as an unanswerable authority on some point of morality... But I had gradually come by this time, i.e., 1836 to 1839, to see that the Old Testament from its manifestly false history of the world, with the Tower of Babel, the rainbow at sign, &c., &c., and from its attributing to God the feelings of a revengeful tyrant, was no more to be trusted than the sacred books of the Hindoos, or the beliefs of any barbarian.

...By further reflecting that the clearest evidence would be requisite to make any sane man believe in the miracles by which Christianity is supported, (and that the more we know of the fixed laws of nature the more incredible do miracles become), that the men at that time were ignorant and credulous to a degree almost uncomprehensible by us, that the Gospels cannot be proved to have been written simultaneously with the events, that they differ in many important details, far too important, as it seemed to me, to be admitted as the usual inaccuracies of eyewitnesses; by such reflections as these, which I give not as having the least novelty or value, but as they influenced me, I gradually came to disbelieve in Christianity as a divine revelation. The fact that many false religions have spread over large portions of the earth like wild-fire had some weight with me. Beautiful as is the morality of the New Testament, it can be hardly denied that its perfection depends in part on the interpretation which we now put on metaphors and allegories.

But I was very unwilling to give up my belief... Thus disbelief crept over me at a very slow rate, but was at last complete. The rate was so slow that I felt no distress, and have never since doubted even for a single second that my conclusion was correct. I can indeed hardly see how anyone ought to wish Christianity to be true; for if so the plain language of the text seems to show that the men who do not believe, and this would include my Father, Brother and almost all of my friends, will be everlastingly punished.

And this is a damnable doctrine.”
― Charles Darwin, The Autobiography of Charles Darwin, 1809–82

“I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.”
― Isaac Asimov, The Roving Mind

“Let's say that the consensus is that our species, being the higher primates, Homo Sapiens, has been on the planet for at least 100,000 years, maybe more. Francis Collins says maybe 100,000. Richard Dawkins thinks maybe a quarter-of-a-million. I'll take 100,000. In order to be a Christian, you have to believe that for 98,000 years, our species suffered and died, most of its children dying in childbirth, most other people having a life expectancy of about 25 years, dying of their teeth. Famine, struggle, bitterness, war, suffering, misery, all of that for 98,000 years.

Heaven watches this with complete indifference. And then 2000 years ago, thinks 'That's enough of that. It's time to intervene,' and the best way to do this would be by condemning someone to a human sacrifice somewhere in the less literate parts of the Middle East. Don't lets appeal to the Chinese, for example, where people can read and study evidence and have a civilization. Let's go to the desert and have another revelation there. This is nonsense. It can't be believed by a thinking person.

Why am I glad this is the case? To get to the point of the wrongness of Christianity, because I think the teachings of Christianity are immoral. The central one is the most immoral of all, and that is the one of vicarious redemption. You can throw your sins onto somebody else, vulgarly known as scapegoating. In fact, originating as scapegoating in the same area, the same desert. I can pay your debt if I love you. I can serve your term in prison if I love you very much. I can volunteer to do that. I can't take your sins away, because I can't abolish your responsibility, and I shouldn't offer to do so. Your responsibility has to stay with you. There's no vicarious redemption. There very probably, in fact, is no redemption at all. It's just a part of wish-thinking, and I don't think wish-thinking is good for people either.

It even manages to pollute the central question, the word I just employed, the most important word of all: the word love, by making love compulsory, by saying you MUST love. You must love your neighbour as yourself, something you can't actually do. You'll always fall short, so you can always be found guilty. By saying you must love someone who you also must fear. That's to say a supreme being, an eternal father, someone of whom you must be afraid, but you must love him, too. If you fail in this duty, you're again a wretched sinner. This is not mentally or morally or intellectually healthy.

And that brings me to the final objection - I'll condense it, Dr. Orlafsky - which is, this is a totalitarian system. If there was a God who could do these things and demand these things of us, and he was eternal and unchanging, we'd be living under a dictatorship from which there is no appeal, and one that can never change and one that knows our thoughts and can convict us of thought crime, and condemn us to eternal punishment for actions that we are condemned in advance to be taking. All this in the round, and I could say more, it's an excellent thing that we have absolutely no reason to believe any of it to be true.”
― Christopher Hitchens

“...But I own that I cannot see as plainly as others do, and as I should wish to do, evidence of design and beneficence on all sides of us. There seems to me too much misery in the world. I cannot persuade myself that a beneficent and omnipotent God would have designedly created the Ichneumonidæ with the express intention of their feeding within the living bodies of Caterpillars, or that a cat should play with mice... I feel most deeply that the whole subject is too profound for the human intellect. A dog might as well speculate on the mind of Newton. Let each man hope and believe what he can.”
― Charles Darwin, The Life & Letters of Charles Darwin

“Circumstantial evidence is a very tricky thing. It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different”
― Arthur Conan Doyle, The Adventures of Sherlock Holmes

“Science replaces private prejudice with public, verifiable evidence.”
― Richard Dawkins

“I think it’s important to reason from first principles rather than by analogy. The normal way we conduct our lives is we reason by analogy. [With analogy] we are doing this because it’s like something else that was done, or it is like what other people are doing. [With first principles] you boil things down to the most fundamental truths…and then reason up from there.”
― Elon Musk

“Does a man of sense run after every silly tale of hobgoblins or fairies, and canvass particularly the evidence? I never knew anyone, that examined and deliberated about nonsense who did not believe it before the end of his enquiries.”
― David Hume, The Letters of David Hume

“It is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.”
― William Kingdon Clifford, The Ethics of Belief and Other Essays

“When even the brightest mind in our world has been trained up from childhood in a superstition of any kind, it will never be possible for that mind, in its maturity, to examine sincerely, dispassionately, and conscientiously any evidence or any circumstance which shall seem to cast a doubt upon the validity of that superstition. I doubt if I could do it myself.”
― Mark Twain, The Autobiography of Mark Twain