Exorcism
In Catholic practice the person performing the exorcism, known as an exorcist, is an ordained priest. The exorcist recites prayers according to the rubrics of the rite, and may make use of religious materials such as icons and sacramentals. The exorcist invokes God—specifically the Name of Jesus—as well as members of the Church Triumphant and the Archangel Michael to intervene with the exorcism. According to Catholic understanding, several weekly exorcisms over many years are sometimes required to expel a deeply entrenched demon.
Exorcism
From the 16th century onward, Lutheran pastoral handbooks describe the primary symptoms of demonic possession to be knowledge of secret things, knowledge of languages one has never learned, and supernatural strength. Before conducting a major exorcism, Lutheran liturgical texts state that a physician be consulted in order to rule out any medical or psychiatric illness. The rite of exorcism centers chiefly around driving out demons "with prayers and contempt" and includes the Apostle's Creed and Our Father.