In the Renaissance, madness was present everywhere and mingled with every experience by its images or its dangers. During the classical period, madness was shown, but on the other side of bars; if present, it was at a distance, under the eyes of a reason that no longer felt any relation to it and that would not compromise itself by too close a resemblance. Madness had become a thing to look at: no longer a monster inside oneself, but an animal with strange mechanisms, a bestiality from which man had long since been suppressed.
Michel Foucault (2001). “Madness and Civilization: A History of Insanity in the Age of Reason”, p.66, Psychology Press