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The Nature and Psychology of Diabolic Influence

Many works have been written on the nature of diabolic warfare but the contents which are necessary to know are scattered across many different works of the approved authors. Historically, the texts written about exorcism and deliverance were largely in Latin and were not a synthesis of the knowledge of experienced exorcists. The goal of this book is to provide that initial synthesis for the priest or professional working in the area of psychology and psychiatry. This book is not written in a popular style. It is more technical than most priests would be accustomed to. It is not meant to be a quick or easy read, but to provide a thoroughness and a proper level to a theological topic which often is only addressed on a superficial level. Since this book also deals with the intersection of the diabolic with human psychology, it is highly recommended that the reader, prior to studying this text, has at least the fundamental knowledge of human psychology from a Thomistic point of view. To that end, it is recommended that he reads this author’s work Introduction to the Science of Mental Health. While that may result in putting off the reading of this book for a while, nevertheless, the reader is most likely to grasp the points made regarding the intersection between diabolic and human psychology. This text is only to be understood to be a beginning or a foundation and not be considered an exhaustive text, despite its length. It is simply not possible to incorporate all of the wisdom of the Church in the various texts throughout the centuries.

Topics include: angelology, demonology, the structure of authority, the different kinds of diabolic influence in detail, wounds and healing, the role of the sacraments and sacramentals as well as general methods of combat. This version differs form the lay version insofar as this version contains around 200 pages of diagnostic information in regard to how an exorcist would diagnose a given form of diabolic influence.  It also contains chapters including Dissociative Identity Disorder, Satanic Ritual Abuse, Charismatic Graces and Their Diabolic Inversions and Qualities of an Exorcist, which are not contained in the lay version.

This book is only available to clergy and health care professions working in the field or with exorcists.  To order the book, please email: info@sensustraditionis.org, indicating one’s name, parish or canonical assignment and address.  For the health care professionals, please have the priest you are working with contact us for copies.  Once the code is obtained, one will be able to order the book through the normal check out process.  For laity who wish to order it for a priest, please email us at: shipping@sensustraditionis.org with the following information: the name of the priest, his parish or assignment and address.  A code will then be sent to you, which can be used to purchase the book.  Once the order is received, the shipping address will be verified and the book shipped.


Weight 48 oz
Dimensions 9.25 × 6.25 × 2.25 in

1 review for The Nature and Psychology of Diabolic Influence

  1. Ramiro Vinet

    Great post. I’m facing many of these issues as well..

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