“Nostalgia was diagnosed at a time when art and science had not yet entirely severed their umbilical ties and when the mind and body—internal and external well-being—were treated together. This was a diagnosis of a poetic science—and we should not smile condescendingly on the diligent Swiss doctors. Our progeny well might poeticize depression and see it as a metaphor for a global atmospheric condition, immune to treatment with Prozac.”