Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The aim of this work may be thus stated: to Show that Nature is not a fortuitous concurrence of atoms, and to assign to man his rightful place in the scheme of the Universe; to rescue from degradation the archaic truths which are the basis of all reli gions; to uncover, to some extent, the fundamental unity from which they all spring; finally, to Show that the Occult side of Nature has never been approached by the Science of modern civilization.