When the ugly ceases to be amusing or merely uninteresting and becomes disgusting, it becomes indeed a positive evil
 George Santayana, The Sense of Beauty (1896). copy citation

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

Context

“(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: but a moral and practical, not an aesthetic one. In aesthetics that saying is true — often so disingenuous in ethics — that evil is nothing but the absence of good: for even the tedium and vulgarity of an existence without beauty is not itself ugly so much as lamentable and degrading.” source