“Man can learn nothing except by going from the known to the unknown.”
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It is what we know already that often prevents us from learning.
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In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes, like the objective reality of things, will be hidden from him forever and that he can only know relations.
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The investigator should have a robust faith - and yet not believe.
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Observation is a passive science, experimentation an active science.
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