The reality of the affinity of dreaming and insanity is well illustrated by a case, coming under the observation of Marro, in which a dream, formed according to the ordinary rules of dreaming, produced a temporary fit of insanity in an otherwise perfectly sane subject.[245] In this case a highly intelligent but somewhat neurotic young man was returning to Italy after pursuing his studies abroad, and reached Turin, on the homeward journey, in a somewhat tired state. In the train he believed that he had detected some cardsharpers, and that they suspected him of finding them out, and bore him ill-will in consequence. This produced a state of general nervous apprehension. At the hotel his room was over the kitchen; it was in consequence very hot, and to a late hour he could still hear voices and catch snatches of conversation, which seemed to him to be directed against himself. His suspicions deepened, he heard noises, in reality due to the kitchen utensils, which seemed preparations for his murder, and he ultimately became convinced that there was a plot to set fire to his room in order to force him to leave it, when he would be seized and murdered. He resolved to escape, got out of the window with his revolver in his hand, found his way to another part of the house, encountered a man who had been awakened by his movements, and shot at him, believing him to be a party to the imaginary conspiracy. He was seized and taken to the asylum, where he speedily regained calm, and realised the delusion into which he had fallen. When questioned by Marro, on reaching the asylum, he was unaware that he had ever fallen asleep during the night; he could not, however, account for all the time that had elapsed before he left the room, and it was probable, Marro concludes, that he was in a state between waking and sleeping, and that his delusion was constituted in a dream. Fatigue, nervous apprehension, an unduly hot bedroom, the close proximity of servants' voices, and the sound of kitchen utensils, had thus combined, in a state of partial sleep, to produce in an otherwise sane person, a morbid condition in every respect identical with that found in insane persons who are suffering from systematised delusions of persecution.[246] The resemblance of the child's psychic state to the dream state is an observation of less ancient date than that of the analogy between dreaming and insanity, but it has frequently been made by modern psychologists. 'In dreams,' says Freud, 'the child with his impulses lives again,'[247] and Giessler has devoted a chapter to the points of resemblance between dream life and the mental activity of children.[248]