NOTHING IS MORE ESTIMABLE than knowledge, for knowledge is the light of the rational soul. The opposite, which is ignorance, is darkness. Just as the absence of light is darkness, so is the absence of knowledge a darkness of the reason. Now, ignorance is proper to irrational beings, while knowledge is proper to those who are rational. Consequently, one who by nature has the faculty of knowing and understanding, yet does not have knowledge, such a one, although by
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