I find this article very interesting.
What is the difference between empathy and sympathy?
Both empathy and sympathy are feelings concerning other people. Sympathy is literally 'feeling with' - compassion for or commiseration with another person. Empathy, by contrast, is literally 'feeling into' - the ability to project one's personality into another person and more fully understand that person. Sympathy derives from Latin and Greek words meaning 'having a fellow feeling'. The term empathy originated in psychology (translation of a German term, c. 1903) and has now come to mean the ability to imagine or project oneself into another person's position and experience all the sensations involved in that position. You feel empathy when you've "been there", and sympathy when you haven't. Examples: We felt sympathy for the team members who tried hard but were not appreciated. / We felt empathy for children with asthma because their parents won't remove pets from the household.
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http://dictionary.reference.com/help/faq/language/d23.htmlI think the article is slightly inaccurate. To me, based on the etymology the difference between sympathy and empathy is *very* subtle, with the key difference being that, in addition to sharing similar emotional states, empathy is conveyed with an intention to help alleviate the other person from suffering. This intention is not conveyed through sympathy.