When Robert Jay Lifton embarked on a project of interviewing Nazi death camp doctors, he started having bad dreams in which he was in a place like Auschwitz along with family members. He talked with Elie Wiesel, an Auschwitz survivor, about the dreams. Wiesel's response: "Good, now you can do the study." Lifton understood Wiesel to be saying that he had to inhabit the subject psychologically, not just academically. That was his way of paying his dues (Witness to an Extreme Century, Free Press).