Logic Quotes

“We loved with a love that was more than love.”
― Edgar Allen Poe

“A truth that's told with bad intent
Beats all the lies you can invent.”
― William Blake, Auguries of Innocence

“Love is not the absence of logic
but logic examined and recalculated
heated and curved to fit
inside the contours of the heart”
― Tammara Webber, Easy

“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

“For, after all, how do we know that two and two make four? Or that the force of gravity works? Or that the past is unchangeable? If both the past and the external world exist only in the mind, and if the mind itself is controllable – what then?”
― George Orwell, 1984

“Now it is such a bizarrely improbable coincidence that anything so mind-bogglingly useful could have evolved purely by chance that some thinkers have chosen to see it as the final and clinching proof of the non-existence of God.
The argument goes something like this: "I refuse to prove that I exist,'" says God, "for proof denies faith, and without faith I am nothing."
"But," says Man, "The Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don't. QED."
"Oh dear," says God, "I hadn't thought of that," and promptly vanishes in a puff of logic.
"Oh, that was easy," says Man, and for an encore goes on to prove that black is white and gets himself killed on the next zebra crossing.”
― Douglas Adams, The Hitchhiker’s Guide to the Galaxy

“When dealing with people, remember you are not dealing with creatures of logic, but with creatures bristling with prejudice and motivated by pride and vanity.”
― Dale Carnegie, How to Win Friends & Influence People

“Contrariwise,' continued Tweedledee, 'if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic.”
― Lewis Carroll, Alice’s Adventures in Wonderland / Through the Looking-Glass

“All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others.”
― Douglas Adams, The Salmon of Doubt: Hitchhiking the Galaxy One Last Time

“There is no point in using the word 'impossible' to describe something that has clearly happened.”
― Douglas Adams, Dirk Gently's Holistic Detective Agency

“Love is illogical, love had consequences--I did this to myself, and I should be able to take it.”
― Marie Lu, Prodigy

“Common sense and a sense of humor are the same thing, moving at different speeds. A sense of humor is just common sense, dancing.”
― Clive James

“A mind all logic is like a knife all blade. It makes the hand bleed that uses it.”
― Rabindranath Tagore

“It's not reasonable to love people who are only going to die," she said.
Nash thought about that for a moment, stroking Small's neck with great deliberation, as if the fate of the Dells depended on that smooth, careful movement.
"I have two responses to that," He said at last. "First, everyone is going to die. Second, love is stupid. It has nothing to do with reason. You love whomever you love. Against all reason I loved my father." He looked at her keenly. "Did you love yours?"
"Yes," she whispered.
He stroked Small's nose. "I love you," he said, "even knowing you'll never have me. And I love my brother, more than I ever realized before you came along. You can't help whom you love, Lady. Nor can you know what it's liable to cause you to do.”
― Kristin Cashore, Fire

“It would have been so pointless to kill himself that, even if he had wanted to, the pointlessness would have made him unable.”
― Franz Kafka, The Trial

“I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of everything my lying memory tells me. I think I have no senses. I believe that body, shape, extension, motion, location are functions. What is there then that can be taken as true? Perhaps only this one thing, that nothing at all is certain.”
― Rene Descartes

“Which came first, the phoenix or the flame?”
"...I think the answer is that a circle has no beginning."
"Well reasoned.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“There are crimes of passion and crimes of logic. The boundary between them is not clearly defined.”
― Albert Camus

“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

“Mathematics expresses values that reflect the cosmos, including orderliness, balance, harmony, logic, and abstract beauty.”
― Deepak Chopra

“It is useless to attempt to reason a man out of a thing he was never reasoned into.”
― Jonathan Swift

“Everything must be taken into account. If the fact will not fit the theory---let the theory go.”
― Agatha Christie, The Mysterious Affair at Styles

“To know and not to know, to be conscious of complete truthfulness while telling carefully constructed lies, to hold simultaneously two opinions which cancelled out, knowing them to be contradictory and believing in both of them, to use logic against logic, to repudiate morality while laying claim to it, to believe that democracy was impossible and that the Party was the guardian of democracy, to forget whatever it was necessary to forget, then to draw it back into memory again at the moment when it was needed, and then promptly to forget it again: and above all, to apply the same process to the process itself -- that was the ultimate subtlety: consciously to induce unconsciousness, and then, once again, to become unconscious of the act of hypnosis you had just performed. Even to understand the word 'doublethink' involved the use of doublethink.”
― George Orwell, 1984

“How very wet this water is.”
― L. Frank Baum, The Marvelous Land of Oz

“I am convinced that the act of thinking logically cannot possibly be natural to the human mind. If it were, then mathematics would be everybody's easiest course at school and our species would not have taken several millennia to figure out the scientific method.”
― Neil deGrasse Tyson, The Sky Is Not the Limit: Adventures of an Urban Astrophysicist

“And thus, the actions of life often not allowing any delay, it is a truth very certain that, when it is not in our power to determine the most true opinions we ought to follow the most probable.”
― Rene Descartes, Discourse on Method

“How do you feel right now?"
"I hurt like hell."
"You'll feel worse tomorrow."
"So?"
"So, better get a jump on this while you still feel...not as bad."
"What kind of logic is that?" I retorted.”
― Richelle Mead, Vampire Academy

“It turned out I was pretty good in science. But again, because of the small budget, in science class we couldn't afford to do experiments in order to prove theories. We just believed everything. Actually, I think that class was called Religion. Religion class was always an easy class. All you had to do was suspend the logic and reasoning you were being taught in all the other classes.”
― George Carlin, Brain Droppings

“World domination is such an ugly phrase. I prefer to call it world optimisation.”
― Eliezer Yudkowsky, Harry Potter and the Methods of Rationality

“Facts don't care about your feelings.”
― Ben Shapiro