There is a true science of the soul, a psychology and philosophy, which is present in Christian ritual and theological process, and which has been present from the early years of the Christian Church. This science is named, retrospectively, The Ogdoadic Tradition, after its main and identifying symbol the Eightfold Star: the Stella Gloriosa Regenerationis , the Glorious Star of Regeneration. It is a study and a discipline which seeks to make the Temple of the Holy Spirit , otherwise called the House of Sacrifice , a living and relevant sanctuary within the human psyche; or, rather, because that sanctuary already exists in latency within each individual, because that sanctuary is the very concourse of forces which forms the psyche itself, to bring that sanctuary clearly into conscious awareness as a potent vehicle of spiritual realization in Christ, to bring it to a state of excellence, of harmonious operation, of perfection. To know, in effect, the chambers of this sanctuary; to enter or approach them in such mode as we are able; ever growing in discernment of their reality and their virtue and their mystical treasures. Our study is thus primarily an exploration of the levels of the human psyche itself, and of the modes in which those levels can be brought into harmonious, dynamic and effective realization; and it also an examination of the ways in which the Church has presented these matters, through the centuries, in image and dissertation. Implicit in this, therefore, is the presence of a true and historically-accepted Pattern of the Spiritual Life, such as is to be found in traditional theology and liturgy and which has given subliminal vibrancy and rational definition to the processes of spiritual advancement as these are relevant to the New Life, the Life of the Resurrection. The study outlines the history and the ethos of the Ogdoadic Tradition of the Christian Mysteries, and explores in details its symbolic formulations and its rich tapestry of philosophic and theological principles. It proceeds to an in-depth consideration of the practical details of the Fivefold Pattern of the Spiritual Life in the symbolism and ceremonies of the Ogdoadic Tradition; and it presents a dynamic range of essential psycho-spiritual techniques to aid general and regular routines of psychic and spiritual self-development.