No man can live without ideas, for every human action, internal or external, is of necessity enacted by virtue of certain ideas.

Published in 1885, this was one of the first works to attempt a complete psychological explanation of all occult phenomena.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations.