No, a angel it is not a symbol of Eros. The angel, or messenger,
is a aspect of the Bible and not connected to ancient Greek
religion.
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The Romans 'adopted' many aspects of religion from different
cultures, including the Greeks. 'Cupid' is the Roman name for the
Greek god 'Eros'.
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There are many online websites that contain the philosophy of
religion. Some of these websites include Wikipedia, Philosophy of
Religion website, and the Stanford Encyclopedia of Philosophy.
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Eros was the god of eros. Eros is Greek for love or sexual
desire.
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For the damage that results from it in regard to morality and religion.