Convictions are more dangerous enemies of truth than lies.
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Original Citation
Nietzsche, Friedrich. Menschliches, Allzumenschliches: Ein Buch für freie Geister [Human, All Too Human: A Book for Free Spirits]. Chemnitz: Ernst Schmeizner, 1878, ninth divison, aphorism 483.
Current Citation
Nietzsche, Friedrich. Human, All Too Human: A Book for Free Spirits, translated by Marion Faber and Stephen Lehmann. University of Nebraska Press, 1984, ninth divison, aphorism 483.