Skepticism Quotes

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

“Blind belief in authority is the greatest enemy of truth.”
― Albert Einstein

“I mean, you could claim that anything's real if the only basis for believing in it is that nobody's proved it doesn't exist!”
― J.K. Rowling

“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

“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 essence of the independent mind lies not in what it thinks, but in how it thinks.”
― Christopher Hitchens, Letters to a Young Contrarian

“Men are never convinced of your reasons, of your sincerity, of the seriousness of your sufferings, except by your death. So long as you are alive, your case is doubtful; you have a right only to their skepticism.”
― Albert Camus, The Fall

“She believed in nothing. Only her scepticism kept her from being an atheist.”
― Jean-Paul Sartre

“My desire and wish is that the things I start with should be so obvious that you wonder why I spend my time stating them. This is what I aim at because the point of philosophy is to start with something so simple as not to seem worth stating, and to end with something so paradoxical that no one will believe it.”
― Bertrand Russell, The Philosophy of Logical Atomism

“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, Letter to a Christian Nation

“It's a most distressing affliction to have a sentimental heart and a skeptical mind.”
― Naguib Mahfouz, Sugar Street

“I don’t believe in astrology; I’m a Sagittarius and we’re skeptical.”
― Arthur C. Clarke

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

“Friends ask you questions; enemies question you.”
― Criss Jami, Healology

“One good schoolmaster is of more use than a hundred priests.”
― Thomas Paine, The Age of Reason

“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, Venus in Arms

“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

“The justifications of men who kill should always be heard with skepticism, said the monster.”
― Patrick Ness, A Monster Calls

“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

“God is an ever-receding pocket of scientific ignorance.”
― Neil DeGrasse Tyson

“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

“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, The Age of Reason

“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

“If Jesus rose from the dead, then you have to accept all that he said; if he didn't rise from the dead, then why worry about any of what he said? The issue on which everything hangs is not whether or not you like his teaching but whether or not he rose from the dead.”
― Timothy Keller, The Reason for God: Belief in an Age of Skepticism

“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

“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, Killosophy

“I have always felt that doubt was the beginning of wisdom, and the fear of God was the end of wisdom.”
― Clarence Darrow, The Story of My Life

“The opinions that are held with passion are always those for which no good ground exists; indeed the passion is the measure of the holders lack of rational conviction. Opinions in politics and religion are almost always held passionately.”
― Bertrand Russell, Sceptical Essays

“...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