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Temple of the Eighth Day: Theurgy, Gnosis, and the Architecture of the Soul

by James Foster PhD, 2026

This book examines the interaction between early Christian tradition and ancient wisdom teachings. Its arguments are based on a centuries-old body of esoteric knowledge concerning inner enlightenment, known amongst initiates as the Ogdoadic Tradition of the Christian Mysteries.

Mysterious topics such as sacred geometry and temple theology are presented here in an illuminating and accessible manner, as is the concept of deification. What role does theurgy play in the Christian tradition, to what extent was Neoplatonic philosophy influential in shaping it, and what exactly does the term ‘gnosis’ have to do with all this?

It discovers a spiritual science, a universal technology of transformation and an architecture of the soul capable of seeing far deeper than modern psychology does today.