Sympathy is thinking about someone, but empathy is actually "Knowing" the emotion the person is experiencing, or going through.... having gone though the same emotion oneself.
When I see a parent pulling a little child who's legs are exhausted, and the child is crying with pain, I "know" what that child is experiencing. I experience empathy for that child.
2. The transfer of somebody's own feelings and emotions to an object such as a painting.
1. Just someone who is very understanding or an empath.
2. Someone who puts his feelings in art.