Dereistic thinking is the main symptom of ambulatory schizophrenia. It is a thinking away from things and as such it is really not thinking insofar as every thought is normally related to some object. The theoretical and practical problem in these cases is that of effective reintegration. These persons are not hopeless as far as therapeutic results are concerned. Some are apparently cured; a number of them only show improvement which, however, is considerable at times; others either remain untouched or show a tendency toward episodic exacerbation. The therapy of choice is psychoanalysis which is usually tedious and prolonged. At times the treatment proceeds almost as an eventless series of monologues, interspersed with seemingly endless silences of impotent rage, without content or change.