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Whoever has followed the history of a single science, finds in its development a clue to the understanding of the oldest and commonest processes of all “knowledge and cognizance”: there, as here, the premature hypotheses, the fictions, the good stupid will to “belief,” and the lack of distrust and patience are first developed⁠—our senses learn late, and never learn completely, to be subtle, reliable, and cautious organs of knowledge. Our eyes find it easier on a given occasion to produce a picture already often produced, than to seize upon the divergence and novelty of an impression: the latter requires more force, more “morality.” It is difficult and painful for the ear to listen to anything new; we hear strange music badly. When we hear another language spoken, we involuntarily attempt to form the sounds into words with which we are more familiar and conversant⁠—it was thus, for example, that the Germans modified the spoken word arcubalista into armbrust (crossbow). Our senses are also hostile and averse to the new; and generally, even in the “simplest” processes of sensation, the emotions