interview with Rome exorcist

"Is the exorcism the highest degree of action against Satan? Are their other means that can come before this last degree?

Conversion! The first thing that we ask from people who come to us is to live in the grace of God, to be faithful to an intense sacramental life and to the life of prayer. After this, if it is necessary, we encourage them to receive prayers of healing and of deliverance, as they are practiced in the Catholic Charismatic Renewal. After a number of such prayers, the person is either already set free, or the need is evident to do the exorcism itself. Then we do the exorcism, keeping in mind that exorcism is a prayer where the result does not always come immediately. Sometimes, years of exorcism are needed for a person to be delivered."
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St. Michael Prayer

Saint Michael the Archangel,
defend us in battle.
Be our protection against the wickedness and snares of the devil.
May God rebuke him, we humbly pray;
and do Thou, O Prince of the Heavenly Host -
by the Divine Power of God -
cast into hell, satan and all the evil spirits,
who roam throughout the world seeking the ruin of souls.

Amen.

demons are like rats

'Deep Wounds, Deep Healing'
by Charles K Kraft

p45
"In deep-level healing we get to cast out lots of demons. But we recognize that demons are like rats. And rats go for 'garbage.' 'Garbage' is the term I use to refer to the spiritual or emotional problems to which demons attach themselves. In order to live in a person, demons need to have a legal right. That right is provided when there are things in the person's past or present life to which demons can attach. When that is taken away, the demons usually go quietly."