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Only a few know, how much one must know to know how little one knows.

Werner Heisenberg

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Werner Heisenberg
Age: 74 †
Born: 1901
Born: December 5
Died: 1976
Died: February 1
Academic
Mathematician
Mountaineer
Non-Fiction Writer
Nuclear Physicist
Physicist
Theoretical Physicist
University Teacher
Kreisfreie Stadt Würzburg
Werner Karl Heisenberg
Heisenberg
Werner K. Heisenberg
Littles
Little
Must
Much

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Nature allows only experimental situations to occur which can be described within the framework of the formalism of quantum mechanics
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Science clears the fields on which technology can build.
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We will have to abandon the philosophy of Democritus and the concept of elementary particles. We should accept instead the concept of elementary symmetries.
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Every tool carries with it the spirit by which it has been created.
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...separation of the observer from the phenomenon to be observed is no longer possible.
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The conception of objective reality ... has thus evaporated ... into the transparent clarity of mathematics that represents no longer the behavior of particles but rather our knowledge of this behavior.
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The more precise the measurement of position, the more imprecise the measurement of momentum, and vice versa.
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My mind was formed by studying philosophy, Plato and that sort of thing.
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In the strict formulation of the law of causality—if we know the present, we can calculate the future—it is not the conclusion that is wrong but the premise. On an implication of the uncertainty principle.
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It seems sensible to discard all hope of observing hitherto unobservable quantities, such as the position and period of the electron... Instead it seems more reasonable to try to establish a theoretical quantum mechanics, analogous to classical mechanics, but in which only relations between observable quantities occur.
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Not only is the Universe stranger than we think, it is stranger than we can think.
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Thus, the more precisely the position is determined, the less precisely the momentum is known, and conversely.
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It was about three o'clock at night when the final result of the calculation [which gave birth to quantum mechanics] lay before me ... At first I was deeply shaken ... I was so excited that I could not think of sleep. So I left the house ... and awaited the sunrise on top of a rock.
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An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them.
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When I meet God, I am going to ask him two questions: Why relativity ? And why turbulence ? I really believe he will have an answer for the first.
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Natural science, does not simply describe and explain nature it is part of the interplay between nature and ourselves
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The more closely you look at one thing, the less closely can you see something else.
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Every word or concept, clear as it may seem to be, has only a limited range of applicability.
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There are things that are so serious that you can only joke about them.
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The problems of language here are really serious. We wish to speak in some way about the structure of the atoms. But we cannot speak about atoms in ordinary language.
Werner Heisenberg