"You know, when I, uh... I first came to work at the FBI, I worked at Violent Crimes, and I saw, I saw the worst of humanity. I saw monsters and I wondered how they became that way, how these men became so evil. I know there were psychological explanations-- victims of their environment, victims of their parents-- but the scientific explanations were never truly satisfying. And I began to think about evil like, like a disease."

Fox Mulder
(8x17 "Empedocles")