Dion Fortune was one of the first to bring this "secret tradition" to a wider audience with her clear and comprehensive exploration of the Qabalah tradition. The Mystical Qabalah remains a classic in its clarity, linking the broad elements of Jewish traditional thought - probably going back to the Babylonian captivity and beyond - with both Eastern and Western philosophy and later Christian insights.

The Qabalah could be described as a confidential Judaic explanation of the paradox of "the Many and the One" - the complexity and diversity within a monotheistic unity. Whereas the Old Testament outlines the social and psychological development of a tightly knit "chosen group" culture, the supplementary Qabalah provides a detailed plan of the infrastructure behind the creative evolutionary process.

The Mystical Qabalah devotes a chapter to each of the ten schematic "God-names," the qualities or Sephiroth which focus on the principal archetypes behind evolving human activity: the Spiritual Source; the principles of Force and Form; Love and Justice; the Integrative principle or the Christ Force; Aesthetics and Logic; the dynamics of the Psyche; and, finally, the Manifestation of life on Earth in a physical body.