“An exorcism at its very core is a prayer. It's a prayer directed to God, who is asked to bring relief into the life of the person. In extreme cases, it's a command given to a demon, commanding it to depart based on the power of the authority of Jesus Christ. But again, it's all about bringing healing into the life of people who are suffering," said Fr. Vincent P. Lampert, a priest in the Archdiocese of Indianapolis, an exorcist, and author of the recent book, "Exorcism: The Battle Against Satan and His Demons" (Emmaus Road Publishing).