"The prospect of penury in age is so gloomy and terrifying that every man who looks before him must resolve to avoid it; and it must be avoided generally by the science of sparing."

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There is not a single rule, however plausible, and however firmly grounded in epistemology, that is not violated at some time or other. It becomes evident that such violations are not accidental events, they are not results of insufficient knowledge or of inattention which might have been avoided. On the contrary, we see that they are necessary for progress.

— Paul Feyerabend