For instance, in the desire world the density of desire stuff causes it to act analogously to smoke, the heaviest of which clings low about the earth, while the purer or lighter rises into the air. During man's life in the physical world he is constantly building his invisible bodies by his thoughts, desires, and emotions. If his desires draw him downward into a life of the senses, if his time is spent in useless pleasures and self-gratification, or if he has no higher aspiration than that of accumulating wealth, then his desire body may be likened to heavy, black smoke. After he passes into the life beyond the grave, he will gravitate to that realm which is called the purgatorial region, that which is closest to the dense physical plane. If we should take a refined, sensitive man who has lived a pure, clean life to the slums of a great city and force him to live in those surroundings, he would suffer, become ill and at the first opportunity he would gravitate back to his kind.
Similar conditions exist in the desire world.
The man who has lived a clean and spiritual life, after passing out at death remains but a short time in the lower part of the desire world. As soon as he has freed himself from his physical body he quickly rises into the finer matter of the desire world. He will hover about spiritualistic seances or the place where his enemy lives until he has succeeded in influencing some weak or negative person to carry out his plan of revenge. The poor, weak drunkard is also used by discarnate spirits and is often forced to drink, for in this way the degenerate in the desire world gets some satisfaction. It is a curious fact that subhuman elementals sometimes attach themselves to certain persons, to a family, or even to a religious society.