1, the theory that "beauty lies in harmony" first appeared in ancient Greece. The aestheticians of Pythagoras school believe that "order and proportion are beautiful" and "music is the harmonious unity of opposing factors" from the mathematical principle.
2. The theory that "beauty lies in perfection" was first popular in medieval Europe. One of the most representative aestheticians is God Thomas Aquinas. Among the three analytical principles of beauty put forward by him in The Complete Book of Theology, the first principle is "completeness or perfection".
3. The theory of spiritual objectivity originated from Plato in ancient Greece. He believes that beauty is an "eternal self-existence"-an "upper bound thing" of an idea, and beauty in the real world is only an imitation of an idea.
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