Natural science does not simply describe and explain nature; it is part of the interplay between nature and ourselves; it describes nature as exposed to our nature of questioning.
~ Werner Heisenberg

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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.
~ Werner Heisenberg

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We have to remember that what we observe is not nature herself, but nature exposed to our method of questioning.
~ Werner Heisenberg

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In general, scientific progress calls for no more than the absorption and elaboration of new ideas — and this is a call most scientists are happy to heed.
~ Werner Heisenberg

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