God, the Devil, and Man form a triangle and each of its sides represents one world. The Devil's wish is to rule over the other two worlds, therefore Devil worshiping gives him the opportunity to ally with people against the gods. (Page 48)
If the building is in the country, the people around it will not suffer. However, if it is in the midst of a city or town, it should not be entirely abandoned to the hostile spirits. If no other avenue is left open, the building should be converted into a daytime temple of any religious denomination, in which people gather to pray. In this way, the entities will occupy the building at night but will be kept in check during the day by the gods invoked in the prayers. This will help ensure that the neighborhood will be left in peace, for the ghosts will have no opportunity to play pranks on people. (Page 44)