Whenever man's spirits are downcast, it is a sign that he scents the proximity of something "ugly."
 Friedrich Nietzsche, Twilight of the Idols (1889). copy citation

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Author Friedrich Nietzsche
Source Twilight of the Idols
Topic proximity spirit
Date 1889
Language English
Reference
Note Translated by Anthony M. Ludovici
Weblink https://www.gutenberg.org/files/52263/52263-h/52263-h.htm

Context

“From the physiological standpoint, everything ugly weakens and depresses man. It reminds him of decay, danger, impotence; he literally loses strength in its presence. The effect of ugliness may be gauged by the dynamometer. Whenever man's spirits are downcast, it is a sign that he scents the proximity of something "ugly." His feeling of power, his will to power, his courage and his pride—these things collapse at the sight of what is ugly, and rise at the sight of what is beautiful. In both cases an inference is drawn;” source