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Narcissism is the personality trait of egotism, vaniry, conceit, or simply selfishness.
Narcissism comes from Narcissius who in greek myth was a pathologically self-absorbed young man who fell in love with his own reflection in a pool. It is believed that some narcissism is an essential part of all of us from birth.
Andrew P. Morrison claims that, in adults, a reasonable amount of healthy narcissism allows the individual's perception of his needs to be balanced in relation to others.