"There is no madness but that which is in every man, since it is man who constitutes madness in the attachment he bears for himself and by the illusions he entertains. Philautia is the first figure Folly leads out in her dance, but that is because they are linked by a privileged relation: self-attachment is the first sign of madness, but it is because man is attached to himself that he accepts error as truth, lies as reality, violence and ugliness as beauty and justice."

--Michel Foucault, Madness and Civilization: A History Of Insanity In The Age of Reason