All that morality can require is the inward harmony of each life: and if we still abhor the thought of a possible being who should be happy without love, or knowledge, or beauty, the aversion we feel is not moral but instinctive, not rational but human. What revolts us is not the want of excellence in that other creature, but his want of affinity to ourselves.
 George Santayana, The Sense of Beauty (1896). copy citation

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

Context

“But no moral precept can require one species or individual to change its nature in order to resemble another, since such a requirement can have no power or authority over those on whom we would impose it. All that morality can require is the inward harmony of each life: and if we still abhor the thought of a possible being who should be happy without love, or knowledge, or beauty, the aversion we feel is not moral but instinctive, not rational but human. What revolts us is not the want of excellence in that other creature, but his want of affinity to ourselves. Could we survey the whole universe, we might indeed assign to each species a moral dignity proportionate to its general beneficence and inward wealth; but such an absolute standard, if it exists, is incommunicable to us;” source