This is a summary of demonic activity as taught by Fr. Armoth, the exorcist of Rome. As Catholics we must be aware of this activity. However we must remain also aware, first and foremost, of the power to overcome evil through Christ, "I can do all things in Him who strengthens me" (Phil 4:13). The first type of demonic activity is called ordinary. This is "temptation", which is the most common activity of the demons, and it is directed against all men. Even Jesus allowed Satan to tempt him, he accepted our human condition.
The second kind of demonic activity is called "extraordinary", and can take place as the first one only if God so allows, but not all humans experience any of the forms of this extraordinary activity. It can take six different forms:
1. External physical pain caused by Satan. We know of this from many lives of the saints. We know that Saint Paul of the Cross, the Curé of Ars, Padre Pio, and many others were beaten, flogged, and pummeled by demons. This external form of persecution does riot affect the soul; therefore with this type there has never been the need for an exorcism, only for prayers.
2. Demonic possession. This occurs when Satan takes full possession of the body (not the soul); he speaks and acts without the knowledge or consent of the victim, who therefore is morally blameless. It is the gravest and most spectacular form of demonic afflictions, and it attracts the attention of producers of movies such as The Exorcist. According to the Ritual for exorcisms, some of the signs of possession include: speaking in tongues, extraordinary strength, and revealing the unknown. The man of Gerasa is a clear Gospel example of possession. To fix a set "model" for demonic possession would be a serious mistake; the affliction runs the gamut of symptoms and severity. For instance, Fr. Armoth has exorcised two totally possessed persons who remained perfectly still and silent during the exorcism.
3. Diabolical oppression. Symptoms vary from a very serious to a mild illness. There is no possession, loss of consciousness, or involuntary action and word. The Bible gives us many examples of oppression; one of them is job, He was not possessed, but he lost his children, his goods, and his health. The bent woman and the deaf and dumb man who were cured by Jesus were not subject to total possession, but there was a demonic presence that caused physical discomfort. Saint Paul was most certainly not possessed by a demon, but he had a demonic oppression that caused an evil affliction: "And to keep me from being too elated by the abundance of revelations, a thorn was given me in the flesh, a messenger of Satan, to harass me" (2 Cor 12:7). There is no doubting the evil origin of the affliction.While possessions are still relatively rare today, we exorcists run into a great number of people who have been struck by the devil in their health, jobs, or relationships. We must make it clear that to diagnose and heal an oppression-related illness is not any easier than to diagnose and cure a person afflicted by full possession. The degree of gravity may be different, but the difficulty of the diagnosis and the amount of time involved in healing are the same.
4. Diabolic obsession. Symptoms include sudden attacks, at times ongoing, of obsessive thoughts, sometimes even rationally absurd, but of such nature that the victim is unable to free himself Therefore the obsessed person lives in a perpetual state of prostration, desperation, and attempts at suicide. Almost always obsession influences dreams. Some people will say that this is evidence of mental illness, requiring the services of a psychiatrist or a psychologist. The same could be said of all other forms of demonic phenomena. Some symptoms, however, are so inconsistent with known illnesses that they point with certainty to their evil origins. Only an expert and well-trained eye can identify the crucial differences.
5. Diabolic infestation. Infestations affect houses, things, or animals. Fr. Armoth does not use this term in referring to persons.
6. Diabolical subjugation, or dependence. People fall into this form of evil when they voluntarily submit to Satan. The two most common forms of dependence are the blood pact with the devil and the consecration to Satan.