This is the first of an intended eight volume series dedicated to the teachings of G.I. Gurdjieff and his student prodigy, P.D. Ouspensky. Volume One is mainly concerned with esoteric psychology according to Gurdjieff; with a few elements added from elsewhere. Most of what we see on our bookshelves today, pertaining to Gurdjieff and Ouspensky, belongs to the last century and is written in a form and style typical of that era. The exception being Gurdjieff's magnum opus - Beelzebub's Tales to his Grandson. It is my intention to create a synergy of all the materials out there and render them more accessible and lucid for the reader in this, the 21st century. In just eight volumes, I will present a synthesis of all those esoteric materials from the past - spread over perhaps as many as 200 volumes in all. The result will be a succinct collection of condensed and uniquely structured materials, which will provide the serious student of esotericism and the intelligent reader alike, with an unsurpassed guide to the Gurdjieff tradition and the wisdom transmission manifested with his arrival in Russia and Europe during the early part of the 20th century. A set of new diagrams pertaining to the subject of esoteric psychology is included in this volume - extrapolated by the writer from Gurdjieff's teachings on the subject.