GILMAN L. Sander, Seeing the Insane

"The relationship between the realities that are being described and the mode of description extends into any historical definition of insanity. The madman is individual seen as "other" by a culture. Thus the image of reality shifts, depending on the time and orientation. Madness includes at one time or another all of the traditional tripartite classifications of anentia, dementia and melancolia. No distinction can be made between somatic and emotional illness if both are understood as subcategories of insanity." (Introduction, iii)