Man almost invariably has philosophic and religious views of the meaning of the world and of his own life. There are some who are proud to have none. These are exceptions outside the common path of mankind; they miss an important function which has proved itself to be indispensable to the human mind. In such cases we find in the unconscious, instead of modern symbolism, an antiquated archaic view of the world and of life. If a requisite psychological function is not represented in the sphere of consciousness, it exists in the unconscious in the form of an archaic or embryonic prototype. This brief _résumé_ may show what the reader cannot find in this collection of papers. The essays are stations on the way of the more general views developed above. C. G. JUNG. ZÜRICH, _January, 1916_. CONTENTS PAGE EDITOR'S PREFACE TO SECOND EDITION v AUTHOR'S PREFACE TO SECOND EDITION ix AUTHOR'S PREFACE TO FIRST EDITION xiii CHAPTER I ON THE PSYCHOLOGY AND PATHOLOGY OF SO-CALLED OCCULT PHENOMENA 1 Difficulty of demarcation in borderline cases between epilepsy, hysteria, and mental deficiency--Somnambulism an hysterical manifestation--A case of spontaneous somnambulism, with some characters of protracted hysterical delirium--Other cases quoted--Charcot's classification of somnambulism--Naef's and Azam's cases of periodic amnesia--Proust's and Boileau's wandering-impulse cases--William James' case of Rev. Ansel Bourne--Other examples showing changes in consciousness--Hypnagogic hallucinations--Neurasthenic mental deficiency, Bleuler's case--Summing up of Miss Elsie K.'s case--Need of further scientific investigation in the field of psychological peculiarities. CASE OF SOMNAMBULISM IN A PERSON WITH NEUROPATHIC INHERITANCE (SPIRITUALISTIC MEDIUM) 16 History of case--Accidental discovery of her mediumistic powers--Her somnambulic attacks, "_attitudes passionelles_," catalepsy, tachypnoea, trance speeches, etc.--Ecstasies--Her conviction of the reality of her visions--Her dreams, hypnagogic and hypnopompic visions--The elevation of her somnambulic character--Mental thought transference--S. W.'s double life--Psychographic communications--Description of séances--The Prophetess of Prevorst--Automatic writing--The two grandfathers--Appearance of other somnambulic personalities. DEVELOPMENT OF THE SOMNAMBULIC PERSONALITIES 30