There are certain deceptive spirits who secretly committed fraud while they were living in the body. Some of them had been fiendishly clever at projecting an angelic image of themselves in order to dupe people. In the next life they learn how to disappear into a less substantial mode of existence and escape the gaze of others, so they consider themselves safe from all retribution. Like others, however, not only do they suffer different kinds of punishment by the rack (depending on the nature and malevolence of their fraud), they are also glued to each other. When this happens, the more they long to free themselves, or split apart, the more tightly they are bound together. This punishment entails fairly intense pain, as it comes in response to their rather well concealed deceits.
There are people who in casual conversation make trivial and derisive comments using phrases from Sacred Scripture—some out of habit and some out of contempt. They believe they are being sophisticated, with their jokes and ridicule. But thoughts and words of this kind cling to the base, unclean notions of such an individual and inflict much damage in the other life, because they come back to the individual with profane ideas attached. Such people too undergo racking punishments, until finally they give up the practice.
from Secrets of Heaven, Volume 2, Sections 960, 961