It is left for me to utilize the explanations gained in this case of paranoia for the comparison of paranoia with compulsion neurosis. Here, as there, the repression was shown to be the nucleus of the psychic mechanism, and in both cases the repression is a sexual experience of childhood. The origin of every compulsion in this paranoia is in the repression, and the symptoms of paranoia allow a similar classification as the one found justified in compulsion neurosis. Some symptoms also originate from the primary defense among which are all delusions of distrust, suspicion and persecution by others. In the compulsion neurosis the initial reproach became repressed through the formation of the primary symptom of defense, self-distrust, moreover, the reproach was recognized as justified, and for the purpose of adjustment the validity acquired by the scrupulousness during the normal interval now guards against giving credence to the returning reproach in the form of an obsession. By the formation of the defense symptom of distrust in others, the reproach in paranoia is repressed in a way which may be designated as projection; the reproach is also deprived of recognition, and as a retaliation there is no protection against the returning reproaches contained in the delusions. The other symptoms in my case of paranoia are therefore to be designated as symptoms of the return of the repression, and as in the compulsion neurosis they show the traces of the compromise which alone permits an entrance into consciousness. Such are the delusions of being observed while undressing, the visual hallucinations, the perceptual hallucinations and the hearing of voices. The memory content existing in the delusion mentioned is almost unchanged and appears only uncertain through utterance. The return of the repression into visual pictures comes nearer to the character of hysteria than to the character of compulsion neurosis; still, hysteria is wont to repeat its memory symbols without modification, whereas the paranoiac memory hallucination undergoes a distortion similar to those in compulsion neurosis. An analogous modern picture takes the place of the one repressed (instead of a child’s lap it was the lap of a woman upon which the hairs were particularly distinct because they were absent in the original impression). Quite peculiar to paranoia but no further elucidated in this comparison is the fact that the repressed reproaches return as loud thoughts, this must yield to a double distortion: (1) a censor, which either leads to a replacement through other associated thoughts or to a concealment by indefinite expressions, and (2) the reference to the modern which is merely analogous to the old.