57 Skepticism Quotes For Thought

In a world overflowing with information and diverse perspectives, skepticism serves as a crucial compass, guiding us towards truth and understanding. As we navigate the complexities of modern life, questioning the status quo and seeking evidence can help us refine our beliefs and make better decisions. In this collection, we've curated the top 57 skepticism quotes to spark your curiosity and encourage you to think critically about the world around you. Whether you're a seasoned skeptic or just beginning to explore the benefits of questioning assumptions, these quotes offer timeless wisdom and profound insights. Join us as we delve into the minds of some of history's greatest thinkers and embrace the power of doubt.

1. “Those who can make you believe absurdities, can make you commit atrocities.” - Voltaire

2. “What can be asserted without evidence can also be dismissed without evidence.” - Christopher Hitchens

3. “...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

4. “I know of no society in human history that ever suffered because its people became too desirous of evidence in support of their core beliefs.” - Sam Harris

5. “It is also worth noting that one can obtain a Ph.D. in any branch of science for no other purpose than to make cynical use of scientific language in an effort to rationalize the glaring inadequacies of tbe Bible. A handful of Christians appear to have done this; some have even obtained their degrees from reputable universities. No doubt, others will follow in their footsteps. While such people are technically "scientists," they are not behaving like scientists. They simply are not engaged in an honest inquiry into the nature of the universe. And their proclamations about God and the failures of Darwinism do not in the least signify that there is a legitimate scientific controversy about evolution.” - Sam Harris

6. “Observation: I can't see a thing. Conclusion: Dinosaurs.” - Carl Sagan

7. “Moral certainty is always a sign of cultural inferiority. The more uncivilized the 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

8. “[Sire,] je n'ai pas eu besoin de cette hypothèse."En répondant Napoléon qui lui demanda pourquoi sa théorie de l'univers ne indique pas Dieux.” - Pierre-Simon Laplace

9. “La pensée ne doit jamais se soumettre, ni à un dogme, ni à un parti, ni à une passion, ni à un intérêt, ni à une idée préconçue, ni à quoi que ce soit, si ce n'est aux faits eux-mêmes, parce que, pour elle, se soumettre, ce serait cesser d'être.” - Jules Henri Poincare

10. “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

11. “If we wanted to construct a basic philosophical attitude from these scientific utterances of Pauli's, at first we would be inclined to infer from them an extreme rationalism and a fundamentally skeptical point of view. In reality however, behind this outward display of criticism and skepticism lay concealed a deep philosophical interest even in those dark areas of reality of the human mind which elude the grasp of reason. And while the power of fascination emanating from Pauli's analyses of physical problems was admittedly due in some measure to the detailed and penetrating clarity of his formulations, the rest was derived from a constant contact with the field of creative processes, for which no rational formulation as yet exists.” - Werner Heisenberg

12. “The chief deficiency I see in the skeptical movement is its polarization: Us vs. Them — the sense that we have a monopoly on the truth; that those other people who believe in all these stupid doctrines are morons; that if you're sensible, you'll listen to us; and if not, to hell with you. This is nonconstructive. It does not get our message across. It condemns us to permanent minority status.” - Carl Sagan

13. “So my antagonist said, "Is it impossible that there are flying saucers? Can you prove that it's impossible?" "No", I said, "I can't prove it's impossible. It's just very unlikely". At that he said, "You are very unscientific. If you can't prove it impossible then how can you say that it's unlikely?" But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.” - Richard P. Feynman

14. “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

15. “It would be better for us to have some doubts in an honest pursuit of truth, than it would be for us to be certain about something that was not true. ” - Daniel Wallace

16. “I have always strenuously supported the right of every man to his own opinion, however different that opinion might be to mine. He who denies to another this right, makes a slave of himself to his present opinion, because he precludes himself the right of changing it.” - Thomas Paine

17. “Persecution is not an original feature in any religion; but it is always the strongly marked feature of all religions established by law.” - Thomas Paine

18. “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

19. “I am satisfied, and sufficiently occupied with the things which are, without tormenting or troubling myself about those which may indeed be, but of which I have no evidence.” - Thomas Jefferson

20. “When anyone tells me that he saw a dead man restored to life, I immediately consider with myself whether it be more probable that this person should either deceive or be deceived or that the fact which he relates should really have happened. I weigh the one miracle against the other and according to the superiority which I discover, I pronounce my decision. Always I reject the greater miracle. If the falsehood of his testimony would be more miraculous than the event which he relates, then and not till then, can he pretend to command my belief or opinion.” - David Hume

21. “Is it more probable that nature should go out of her course or that a man should tell a lie? We have never seen, in our time, nature go out of her course. But we have good reason to believe that millions of lies have been told in the same time. It is therefore at least millions to one that the reporter of a miracle tells a lie. ” - Thomas Paine

22. “Are you really surprised by the endurance of religion? What ideology is likely to be more durable than one that conforms, at every turn, to our powers of wishful thinking? Hope is easy; knowledge is hard. Science is the one domain in which we human beings make a truly heroic effort to counter our innate biases and wishful thinking. Science is the one endeavor in which we have developed a refined methodology for separating what a person hopes is true from what he has good reason to believe. The methodology isn't perfect, and the history of science is riddled with abject failures of scientific objectivity. But that is just the point-these have been failures of science, discovered and corrected by-what, religion? No, by good science.” - Sam Harris

23. “The glory of science is, that it is freeing the soul -- breaking the mental manacles -- getting the brain out of bondage -- giving courage to thought -- filling the world with mercy, justice, and joy.” - Robert G. Ingersoll

24. “In all ages the people have honored those who dishonored them. They have worshiped their destroyers; they have canonized the most gigantic liars, and buried the great thieves in marble and gold. Under the loftiest monuments sleeps the dust of murder.” - Robert G. Ingersoll

25. “Progress is born of doubt and inquiry. The Church never doubts, never inquires. To doubt is heresy, to inquire is to admit that you do not know—the Church does neither.” - Robert G. Ingersoll

26. “With their backs to the sunrise they worship the night.” - Robert G. Ingersoll

27. “Johnson is a radical skeptic, insisting, in the best Socratic tradition, that everything be put on the table for examination. By contrast, most skeptics opposed to him are selective skeptics, applying their skepticism to the things they dislike (notably religion) and refusing to apply their skepticism to the things they do like (notably Darwinism). On two occasions I’ve urged Michael Shermer, publisher of Skeptic Magazine, to put me on its editorial board as the resident skeptic of Darwinism. Though Shermer and I know each other and are quite friendly, he never got back to me about joining his editorial board.” - William A. Dembski

28. “We should be cautiously open to the spiritual and non-rational, and skeptical of the more invisible magical thinking—what we might call “magical reason”—pervading secular thought and experience in modern society. Science and technology are for most people a new religion, and their orthodoxies are believed with the same fervor.” - David Watson

29. “To be a philosophical Sceptic is the first and most essential step towards being a sound, believing Christian.” - David Hume

30. “Why do we not accept ESP as a psychological fact? Rhine has offered enough evidence to have convinced us on almost any other issue... Personally, I do not accept ESP for a moment, because it does not make sense. My external criteria, both of physics and of physiology, say that ESP is not a fact despite the behavioral evidence that has been reported. I cannot see what other basis my colleagues have for rejecting it... Rhine may still turn out to be right, improbable as I think that is, and my own rejection of his view is - in the literal sense - prejudice.” - Donald Hebb

31. “People are not stupid. They believe things for reasons. The last way for skeptics to get the attention of bright, curious, intelligent people is to belittle or condescend or to show arrogance toward their beliefs.” - Carl Sagan

32. “Nevertheless, (Jefferson) believed that the habit of skepticism is an essential prerequisite for responsible citizenship. He argued that the cost of education is trivial compared to the cost of ignorance, of leaving government to the wolves. He taught that the country is safe only when the people rule.” - Carl Sagan

33. “... skepticism can never provide firm ground under a man's feet. And perhaps, after all, we need firm ground.” - Aleksandr Solzhenitsyn

34. “I think you'll find it's a bit more complicated than that.” - Ben Goldacre

35. “The justifications of men who kill should always be heard with skepticism, said the monster.” - Patrick Ness

36. “We all ought to understand we're on our own. Believing in Santa Claus doesn't do kids any harm for a few years but it isn't smart for them to continue waiting all their lives for him to come down the chimney with something wonderful. Santa Claus and God are cousins.” - Andy Rooney

37. “In an extroverted society, the difference between an introvert and an extrovert is that an introvert is often unconsciously deemed guilty until proven innocent.” - Criss Jami

38. “I'm convinced that most men don't know what they believe, rather, they only know what they wish to believe. How many people blame God for man's atrocities, but wouldn't dream of imprisoning a mother for her son's crime?” - Criss Jami

39. “It all depends on what people you're talking about helping. That's the wonderful think about just about every religion on the planet - they're all so incredibly selfish.” - Derek Landy

40. “Atheism is the opium of the mathematicians. Atheism is the religion of Mathematics.” - Bill Gaede

41. “To point out nonepistemic motives in another’s view of the world, therefore, is always a criticism, as it serves to cast doubt upon a person’s connection to the world as it is.” - Sam Harris

42. “There was a time when skepticism was an act of rebellion. Since to a degree I both believe in evolution and have faith, I can only conclude that, as prophesied, to have faith will someday be an act of rebellion.” - Criss Jami

43. “Faeries and vampires were glittery now? Honestly.” - Kiersten White

44. “Dean, you've been to Hell, I started the Apocalypse, and we're supposed to be possessed by an archangel and the devil. Now you're being skeptical?” - Keith R. A. DeCandido

45. “Isn't this enough? Just this world? Just THIS?” - Tim Minchin

46. “You must picture me alone in that room in Magdalen, night after night, feeling, whenever my mind lifted even for a second from my work, the steady, unrelenting approach of Him whom I so earnestly desired not to meet. That which I greatly feared had at last come upon me. In the Trinity Term of 1929 I gave in, and admitted that God was God, and knelt and prayed: perhaps, that night, the most dejected and reluctant convert in all England. I did not then see what is now the most shining and obvious thing; the Divine humility which will accept a convert even on such terms. The Prodigal Son at least walked home on his own feet. But who can duly adore that Love which will open the high gates to a prodigal who is brought in kicking, struggling, resentful, and darting his eyes in every direction for a chance of escape? The words “compelle intrare,” compel them to come in, have been so abused be wicked men that we shudder at them; but, properly understood, they plumb the depth of the Divine mercy. The hardness of God is kinder than the softness of men, and His compulsion is our liberation.” - C.S. Lewis

47. “The real reason why so few men believe in God is that they have ceased to believe that even a God can love them.” - Thomas Merton

48. “Scepticism is the first step towards truth.” - Denis Diderot

49. “I perceive that it is far more practical to begin at the beginning and discuss theories. I see that the men who killed each other about the orthodoxy of the Homoousion were far more sensible than the people who are quarrelling about the Education Act. For the Christian dogmatists were trying to establish a reign of holiness, and trying to get defined, first of all, what was really holy. But our modern educationists are trying to bring about a religious liberty without attempting to settle what is religion or what is liberty. If the old priests forced a statement on mankind, at least they previously took some trouble to make it lucid. It has been left for the modern mobs of Anglicans and Nonconformists to persecute for a doctrine without even stating it.” - G.K. Chesterton

50. “For God to prove himself on demand, physically, would be a grave disappointment, and the strongest Christians should be considerably grateful that he chooses not to do so. The skeptic endlessly demands proof, yet God refuses to insult the true intelligence of man, the '6th sense', the chief quality, the acumen which distinguishes man from the rest of creation, faith.” - Criss Jami

51. “In a post-Christian, skeptical age, love on display is the most convincing apologetic.” - J.D. Greear

52. “One of the biggest problems with the world today is that we have large groups of people who will accept whatever they hear on the grapevine, just because it suits their worldview—not because it is actually true or because they have evidence to support it. The really striking thing is that it would not take much effort to establish validity in most of these cases… but people prefer reassurance to research.” - Neil deGrasse Tyson

53. “Skeptics always want miracles such as stepping down from the Cross, but never the greater miracle of forgiveness.” - Fulton J. Sheen

54. “There is a horrifying loneliness at work in this time. No, listen to me. We lived six and seven to a room in those days, when I was still among the living. The city streets were seas of humanity; and now in these high buildings dim-witted souls hover in luxurious privacy, gazing through the television window at a faraway world of kissing and touching. It is bound to produce some great fund of common knowledge, some new level of human awareness, a curious skepticism, to be so alone.” - Anne Rice

55. “The cold logic of mid-twentieth-century atheism has now given way to an era of renewed 'spirituality,' but it is an awakening more thrapeutic than pious, more attuned to self-expression than self-denial. It is now fashionable to talk about God, though it is still deeply unfashionable to believe in him.” - J. Mark Bertrand

56. “A mode of thought does not become 'critical' simply by attributing that label to itself, but by virtue of its content.” - Alan Sokal

57. “A skeptic, I would ask for consistency first of all.” - Sylvia Plath