It is never the perception of a positive evil, it is never a negative value.
 George Santayana, The Sense of Beauty (1896). copy citation

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Author George Santayana
Source The Sense of Beauty
Topic perception evil
Date 1896
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/26842/26842-h/26842-h.htm

Context

“a beauty to which all men were forever indifferent is a contradiction in terms. In the second place this value is positive, it is the sense of the presence of something good, or (in the case of ugliness) of its absence. It is never the perception of a positive evil, it is never a negative value. That we are endowed with the sense of beauty is a pure gain which brings no evil with it. When the ugly ceases to be amusing or merely uninteresting and becomes disgusting, it becomes indeed a positive evil:” source