“…Thus Kraepelin, in the 4th and 5th editions of his Psychiatric Textbook [8,9] , not only subsumed psychotic symptoms such as ego disturbance, delusion, and catatony within obsessivecompulsive disorder, but also failed to distinguish between delusional ideas [5] and obsessive thoughts and overvalued ideas [10] . In the nosological fi eld of the nonpsychotic symptoms, obsession became the umbrella term for phobias, for overvalued ideas, for affects such as rage, anger, or love, for impulsive acts such as suicide, homicide, pyromania, kleptomania, and dromomania, as well as for certain forms of sexuality [3,11] . Taken to an extreme, obsession is for Kronfeld [12] the fi nal stage in a transition series from impetus, impulse, idea, and drive to urge, craving, and obsession, thus a state in which the feeling of activity as such is lost and where sheer defencelessness and suffering are the dominating elements.…”