Logic Quotes

500+ Sourced quotes

What a silly thing love is! It is not half as useful as logic, for it does not prove anything and it is always telling one things that are not going to happen, and making one believe things that are not true.

Experience, the only logic sure to convince a diseased imagination and restore it to rugged health.

The reasoning is classic in its clarity. If God does not exist, Kirilov is god. If God does not exist, Kirilov must kill himself. Kirilov must therefore kill himself to become god. That logic is absurd, but it is what is needed.

For the question is of will, and not, as the insanity of logic has assumed of power. It is not that the Deity cannot modify his laws, but that we insult him in imagining a possible necessity for modification. In their origin these laws were fashioned to embrace all contingencies which could lie in the future. With God all is Now.

Edgar Allan Poe

Of all the systems of morality, ancient or modern, which have come under my observation, none appear to me so pure as that of Jesus. He who follows this steadily need not, I think, be uneasy, although he cannot comprehend the subtleties and mysteries erected on his doctrines by those who, calling themselves his special followers and favorites, would make him come into the world to lay snares for all understandings but theirs. These metaphysical heads, usurping the judgment seat of God, denounce as his enemies all who cannot perceive the Geometrical logic of Euclid in the demonstrations of St. Athanasius, that three are one, and one is three; and yet that the one is not three nor the three one.

Thomas Jefferson

The less we have, the more we give. Seems absurd, but it's the logic of love.

The beauty of religious mania is that it has the power to explain everything. Once God (or Satan) is accepted as the first cause of everything which happens in the mortal world, nothing is left to chance...logic can be happily tossed out the window.

Where the world ceases to be the scene of our personal hopes and wishes, where we face it as free beings admiring, asking, observing, there we enter the realm of Art and Science. If what is seen and experienced is portrayed in the language of logic, we are engaged in science. If it is communicated through forms whose connections are not accessible to the conscious mind but are recognized intuitively as meaningful, then we are engaged in art. Common to both is love and devotion to that which transcends personal concerns and volition.

Albert Einstein

End of the wonderful one-hoss shay.
Logic is logic. That's all I say.

Oliver Wendell Holmes, Sr.

Logic has borrowed, perhaps, the rules of geometry, without comprehending their force... it does not thence follow that they have entered into the spirit of geometry, and I should be greatly averse... to placing them on a level with that science that teaches the true method of directing reason.

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....

Timothy looked at the deep ocean sky, trying to see Earth and the war and the ruined cities and the men killing each other since the day he was born. But he saw nothing. The war was as removed and far off as two flies battling to the death in the arch of a great high and silent cathedral. And just as senseless...
What are you looking at so hard, Dad?
I was looking for Earthian logic, common sense, good government, peace, and responsibility.
All that up there?
No. I didn't find it. It's not there any more. Maybe it'll never be there again. Maybe we fooled ourselves that it was ever there.

When dealing with people, remember you are not dealing with creatures of logic, but creatures of emotion.

Aristotle… a mere bond-servant to his logic, thereby rendering it contentious and well nigh useless.

It must be, for there is a logic to everything on this earth and nothing is done without a reason, that God sometimes lets scientists discover.

Absolute virtue is impossible and the republic of forgiveness leads, with implacable logic, to the republic of the guillotine.

Hegel's... deepest objections to the view of knowledge as method and power, as controlling knowledge (Scheler, Tillich) or the logic of domination (Marcuse), are moral. He agrees with Schiller that utility is the great idol of the times.

Merold Westphal

Logic, n. The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding.

Doctor Who has never pretended to be hard science fiction … At best Doctor Who is a fairytale, with fairytale logic about this wonderful man in this big blue box who at the beginning of every story lands somewhere where there is a problem.

That night Paradine slept badly. Holloway's parallel had been ill-chosen. It led to disturbing theories. The x factor — The children were using the equivalent of algebraic reasoning, while adults used geometry.
Fair enough. Only —
Algebra can give you answers that geometry cannot, since there are certain terms and symbols which cannot be expressed geometrically. Suppose x logic showed conclusions inconceivable to an adult mind?

The choice is not between order and liberty. It is between liberty with order and anarchy without either. There is danger that, if the Court does not temper its doctrinaire logic with a little practical wisdom, it will convert the constitutional Bill of Rights into a suicide pact.

Robert H. Jackson

Logos and logic, crystal hypothesis,
Incipit and a form to speak the word
And every latent double in the word, Beau linguist.

Wallace Stevens

It'll probably be brutal, too. They might even feed you to the dog. He doesn't have a dog. Yeah, well, he might get one just to feed you to it. She'd never been the kind of person to let something as ridiculous as rational logic interfere with her fear.' (Alix)

Sherrilyn Kenyon

As in political revolutions, so in paradigm choice—there is no standard higher than the assent of the relevant community...this issue of paradigm choice can never be unequivocally settled by logic and experiment alone.

I am not a complete idiot, but whether from weakness or laziness have no talent for thinking. I know only how to reflect: I am a mirror... Logic does not exist for me. I float on the waves of art and life and never really know how to distinguish what belongs to the one or the other or what is common to both. Life unfolds for me like a theatre presenting a sequence of somewhat unreal sentiments; while the things of art are real to me and go straight to my heart.

Sviatoslav Richter