Imagine a heart which has been ripped from a man's body, wrapped with thorns, pierced with a knife, and then placed on the man's chest; or a group of people who believe that wearing a small rectangle of wool next to their skin ensures that they will go to heaven - as long as it is brown wool and worn continuously. Although psychoanalysts have long investigated similar ideas and beliefs, they have ignored popular Catholicism, even though behaviour such as this occurs over and over again in the history of Catholic cults and devotions.