(_f_) Under the term "press of ideas," and similar intellectual troubles, may be classified the "want of clearness and logic of the schizophrenic thinking," which Bleuler considers a predisposing cause. I have, as I may presume is known, expressed myself with much reserve on what he regards as the premeditation of the schizophrenic adjustment. Further and wider experience has taught me that the laws of the Freudian psychology of dreams and the theory of the neuroses must be turned towards the obscurities of schizophrenic thinking. _The painfulness of the elaborated complex necessitates a censorship of its expression._[171] This principle has to be applied to schizophrenic disturbance in thinking; and until it has been proved that this principle is not applicable to schizophrenia, there is no justification for setting up a new principle; _i.e._ to postulate that schizophrenic disturbance of ideas is something primary. Investigations of hypnagogic activity, as well as association reactions in states of concentrated attention, give psychical results which up to now are indistinguishable from the mental conditions in schizophrenia. For example excessive relaxation of attention suffices to conjure up images as like as two peas to the phantasies and expressions of schizophrenia. It will be remembered that I have attributed the notorious disturbances of attention in schizophrenia to the special character of the complex; an idea which my experience since 1906 have further confirmed. There are good reasons for believing specific schizophrenic thought-disturbance to be the _result of a complex_. Now as regards the symptoms of thought-pressure, it is first and foremost a thought-compulsion, which, as Freud has shown, is first a thought-complex and secondly a _sexualisation of the thought_. Then to the symptom of thought-pressure there is superadded at least a _demoniac_ impulse such as _may be observed in every vigorous release or production of libido_. Thought-pressure, on closer examination, is seen to be a result of schizophrenic introversion, which necessarily leads to a sexualisation of the thought; _i.e._ to an autonomy of the complex.[172]