Mediumship is beautiful and is an extremely useful faculty
but, there are dangers involved. Below they are classified as
follows from The Mediums Book by Allan Kardec.
1 - Simple Obsession - exists when a spirit imposes himself on a
medium, against the medium's will, into and with all the
communications received by the medium, or prevents the medium from
communicating with other spirits, by substituting himself.
In this case, the medium is aware that he is dealing with a
2 - Fascination- is an illusion which is produced by the direct
action of a spirit on the medium's thought, which paralyses the
medium's judgment with regard to the communications the medium
The deceiving spirit artfully inspires in the medium a blind
confidence which prevents the medium from seeing the absurdity of
his thoughts and any spirit communications received, even when this
is clear to everyone else.
The fascinated medium cannot believe he is being deceived.
3- Subjugation- is the third degree of obsession in which a spirit
paralyses the will of the medium, reducing the medium to a state of
absolute bondage. Subjugation can be moral and corporeal.
Moral, in that, the medium is often drawn on to do things which are
foolish or horrible, which the medium is deluded into thinking are
wise and proper. It is a species of fascination which acts on the
will and the mind.
Corporeal, in that, the spirit acts on the material organs of the
victim, provoking involuntary movements or acts.
The spirit is in complete control of the medium.
We may recognize the existence of obsession by the following signs:
1 - the persistence in a spirit communicating, by any means, and his
persistence in preventing other spirits from manifesting themselves.
2 - the illusion that prevents the medium from seeing falsity and
absurdity in the communications he receives.
3 - a belief in the absolute identity and infallibility of spirits,
who under respected and venerated names, say foolish and false
4 - The medium's confidence on the praises heaped on him by the
spirits who can communicate through him.
5 - A disposition to shun the presence of those who might give him
6 - Offense taken at criticism of communications received by him.
7 - An incessant desire to write, etc., without regard to time and
8 - Physical constraint over-ruling the medium's will and forcing
him to speak and act, in spite of himself.
9 - Persistent noises and other disturbances around the medium, of
which he is at once the cause, and the object.
Points to remember
Evil spirit influences affect people whether they are mediums or
not. Knowledge of Spiritism makes us aware these influences exist
and it helps us to combat these influences. There are no "magic"
words that can be said to remove evil spirits from our side. Our
moral imperfections bring us under the power of obsessing spirits,
and the surest method of getting rid of them is to attract good
spirits to us by the practice of virtue. Good spirits are more
powerful than bad ones and their will suffices to keep the bad ones
away. Butů they only assist those who second the action of their
will by their own efforts. If no such effort is made, they may
withdraw leaving us free to the evil ones.
There are ignorant and evil people, when they return to the spirit
world, their moral inclinations do not change, so they are the same
as spirits. It is only through successive existences, through the
law of cause and effect, and that of progress, that they will
eventually see the error of their ways and advance in morality and
From The Mediums Book Chapt. XXIII