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“The discoveries of yesterday are the truisms of tomorrow, because we can add to our knowledge but cannot subtract from it.” quote by Arthur Koestler — Download Open image

“The discoveries of yesterday are the truisms of tomorrow, because we can add to our knowledge but cannot subtract from it.”

Arthur Koestler

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The inner defenses are unconscious. They consist of a kind of magic aura which the mind builds around cherished belief. Arguments which penetrate into…

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The temptations of God were always more dangerous for mankind than those of Satan.

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The greatest temptation for the like of us is: to renounce violence, to repent, to make peace with oneself. Most revolutionaries fell before this…

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The revolutions of thought which shape the basic outlook of an age are not disseminated through text-books- they spread like epidemics, through contamination by…

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The moment of truth, the sudden emergence of a new insight, is an act of intuition. Such intuitions give the appearance of miraculous flushes,…

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Coincidence may be described as the chance encounter of two unrelated causal chains which - miraculously, it seems - merge into a significant event.

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The more original a discovery, the more obvious it seems afterwards.

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“Revolutionary theory had frozen to a dogmatic cult, with a simplified, easily graspable catechism, and with No. 1 as the high priest celebrating the Mass.”

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Coincidence may be described as the chance encounter of two unrelated causal chains which

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The more backwoodish a social group, juvenile or adult, the stricter its conception of the normal, and the readier it will ridicule any departure…

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As modern physics started with the Newtonian revolution, so modern philosophy starts with what one might call the Cartesian Catastrophe. The catastrophe consisted in…

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If one looks with a cold eye at the mess man has made of history, it is difficult to avoid the conclusion that he…

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Explore all 199 Arthur Koestler quotes

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Most marriages don't add two people together. They subtract one from the other.

Ian Fleming

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Friendship, "the wine of life," should, like a well-stocked cellar, be continually renewed; and it is consolatory to think, that although we can seldom…

James Boswell

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Life as we know it is fundamentally unsatisfying. I think most folks feel this to be true. They know that a life of aimless…

Michael Yates

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Give me a platter of choice finnan haddie, freshly cooked in its bath of water and milk, add melted butter, a slice or two…

Craig Claiborne

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Writing adds up to the conscience of our times.

Martin Firrell

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A 'modern' man has nothing to add to modernism, if only because he has nothing to oppose it with. The well-adapted drop off the…

Elias Canetti

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Observation and theory get on best when they are mixed together, both helping one another in the pursuit of truth. It is a good…

Arthur Eddington

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I may add that we have more than once stated our willingness to conclude nonaggression pacts with the states neighboring our own!

Adolf Hitler

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The American Constitution declares 'All men are born equal.' The British Socialist Party add: 'All men must be kept equal'.

Winston Churchill

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New generations of humans inherit the acquired discoveries of generations past, allowing cosmic insight to accumulate without limit. Each discovery of science therefore adds…

Neil deGrasse Tyson