961. When the purer thoughts are raised up from a person, then bodily and thus more unclean elements also follow along in double file, or like pace. Those elements are compatible with [the spirits] who constitute the province of the Kidneys, and who bring them into it. Those in that province therefore concentrate their mind on them, and thus draw them away from the purer elements, so that the purer elements are raised up toward heaven without an unclean companion.