I've always thought of acting as more of an exercise in empathy which is not to be confused with sympathy. You're trying to get inside a certain emotional reality or motivational reality and try to figure out what that's about so you can represent it.
Children require guidance and sympathy far more than instruction.
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It's no good being nice and young and naive. There's no good in that at all. You've got to do it all yourself and you've gotta learn quick. And you can't look for sympathy either.