The Twilight of the Idols · Friedrich Wilhelm Nietzsche
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_Casuistry of a Psychologist._—This man knows mankind: to what purpose does he study his fellows? He wants to derive some small or even great advantages from them,—he is a politician!... That man yonder is also well versed in human nature: and ye tell me that he wishes to draw no personal profit from his knowledge, that he is a thoroughly disinterested person? Examine him a little more closely! Maybe he wishes to derive a more wicked advantage from his possession; namely, to feel superior to men, to be able to look down upon them, no longer to feel one of them. This “disinterested person” is a despiser of mankind; and the former is of a more humane type, whatever appearances may seem to say to the contrary. At least he considers himself the equal of those about him, at least he classifies himself with them.
Text from Project Gutenberg, public domain in the United States.