The Permeable Self: Five Medieval Relationships - Paperbackby Barbara Newman (Author) How, Barbara Newman asks, did the myth of the separable heart take such a firm hold in the Middle Ages, from lovers exchanging hearts with one another to mystics exchanging hearts with Jesus? What special traits gave both saints and demoniacs their ability to read minds? Why were mothers who died in childbirth buried in unconsecrated ground? Each of these phenomena, as diverse as they are, offers evidence for a distinctive