obsession

Obsession, also known as spirit obsession, is a technical term within the Spiritist belief and practice defined by the author Allan Kardec as the interference of a subjugating spirit with a weaker spirit (cf. Latin obsidere, "besiege"). Although the term most commonly refers to the negative influence of the spirit of an evil deceased person on the mind or spirit of a living person, obsession can occur in either direction.
Obsession is believed by many Spiritists to be a major danger to unprepared and untrained mediums. It is also believed to be one of the most frequent causes of mental illness and criminal behaviour.Because the danger of obsession is a core belief within Spiritism, dealing with it is one of the cornerstones of Spiritist religious activity, and it is treated at Spiritist centres by means of prayer and teaching. Its centrality to Spiritist doctrine and practice is one of the marks that generally distinguishes Spiritism from both Spiritualism and the Spiritual Church Movement. However, the 19th century Spiritualist author Paschal Beverly Randolph also recognized the dangers of obsession to mediums, and claimed to have been harmed by evil spirits during his own career as a Spiritualist lecturer and trance medium.

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