In Luke we are told that "When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest and finding none," proving that evil has no abiding place. A little thoughtful study of these verses teaches a helpful lesson.
First, if Truth had cast the "unclean spirit" out," swept and garnished," the house (consciousness) would not have been empty, for Truth would have been there, and Truth and error cannot occupy the same place.
Second, we see error at work in the name of Good, for it sent the "unclean spirit" away, but left the house empty, and when this evil spirit returned with his fellow-associates, there was nothing to prevent them from entering; his servant, fear, let them in.