A psychology professor reveals a counterintuitive way to stop being a victim to psychopaths.

“The reason that Harry Potter can withstand Voldemort is that he's got a piece of him. He's been touched by it. The way you keep psychopaths at bay is to develop the inner psychopath so you know one when you see one. That's a voluntary thing, a set of tools you have at your disposal, which is a full knowledge of evil.”

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