For those which believe, none explanation is not necessary.
For those which do not believe, no explanation is possible.

After having studied demonology during many years, with all its tricks and its misdeeds.

Us, Priests of God, let us put all works about it to thwart its traps.

Majority of the black magic comes from Africa, and Maghreb.
This " black art " is the art to damage the other human beings by demonic powers.

The moral theologians teach that the magic maybe neutralized by the prayer, the exorcism, or the destruction of the article or of the sign which connects her with the strengths of the evil.
But, for 99 % of the cases, the patients are victims of bewitchment of nuisances (heavy to support).

But the ownership shows itself during the rite of prayer, because the entity tries to hide. In case of violent appearances, the Exorcist will have to place his trust in God.
The ownership can remain hidden well, in particular if it begins early in the childhood. In these cases, somebody chosen by the Lord, can identify the visible state completely accidentally. It is what arrived in saint PARTHENIUS's life, a Bishop of the fourth century. The malignant, not to quote him, managed to persuade that it does not exist any more and when we speak about it, people laugh. Then, he can pollute as one pleases.