The psychoanalyst ought still to remember the time when the attempt to form an objective opinion about analytic methods and results was considered a sign of bad taste. This psychoanalyst will not assume a similar attitude towards another new approach, in this instance, parapsychology. Johannes J. Poortman gives a careful presentation of Kant's and Copernicus' philosophical systems, with emphasis upon the conception of supra-subject and infra-subject. He shows the relation of parapsychology to philosophy and Weltanschauung and concludes that parapsychology is a new science. In the third lecture he gives an account of parapsychological motifs in world literature.

In spite of the attempted open-mindedness of the reviewer, the author is as convincing in his reasoning as a neurotic who gives hygienic reasons for his washing ritual.