Between 1901 and 1944, Edgar Cayce gave more than fourteen thousand ""readings"" for nearly six thousand persons, who sought his prescription for their bodily ailments and afflictions. He produced these readings while in a state of self-imposed hynotio sleep, induced through a carefully controlled procedure, and yet seems never to have been conscious of a single word he spoke. Early in this strange career, he became famous, subject to a considerable body of magazine, newspaper, and biographical report. In this volume, his son undertakes to give a responsible narrative account of his father's clairvoyance, and to relate it to various ""doorways to the unconscious"" of the past and present. He warns against the misuse or abuse of such procedures as automatic writing, extra-sensory perception, the use of drugs, and others; and then points out the productive possibilities in the development of capacities for telepathy, dream-interpretation, and meditation. The tone is one of constraint and moderation. The book may be of interest to the widening circle of those concerned with the extra-conscious dimensions of human personality and human experience.