Possession

"Possession" by T. K. Oesterreich is a comprehensive and scholarly examination of the phenomenon of possession throughout history and across diverse cultures. Drawing on vast psychological, theological, and historical sources, Oesterreich explores the manifestations of "demonical" possession, distinguishing between spontaneous occurrences and those induced in mediums. The work delves into the psychological mechanisms behind these states, comparing them to clinical conditions such as hysteria and multiple personality disorder.

By analyzing accounts from antiquity to the early 20th century, the author provides a rigorous investigation into how individuals experience and interpret the presence of foreign entities within themselves. The text meticulously categorizes various forms of possession, examining their relation to religious ecstasy and shamanism. This influential study remains a foundational text in the fields of parapsychology and the psychology of religion, offering profound insights into the complexities of the human psyche and the intersection of spiritual belief and mental health. It is an essential resource for those interested in the history of psychology and the cross-cultural study of altered states of consciousness.

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