"In academia, … an art historian, on being stirred to tears by the tenderness and serenity he detects in a work by a fourteenth-century Florentine painter, may end up writing a monograph, as irreproachable as it is bloodless, on the history of paint manufacture in the age of Giotto. It seems easier to respond to our enthusiasms by trading in facts than by investigating the more naive question of how and why we have been moved."