Iamblichus on the Mysteries of the Egyptians Chaldeans and Assyrians

This Neoplatonic treatise is a defense of theurgic practice, explaining how ritual, symbols, and divine intermediaries can aid the soul’s return to the divine. Written in late antiquity, it is one of the major philosophical texts underpinning Western esotericism, and readers will find arguments about ritual efficacy, divine knowledge, and the role of sacred rites in spiritual transformation.

Iamblichus (c. 245–c. 325 CE) was a late antique Neoplatonist philosopher whose writings profoundly influenced later mystical and theurgical traditions. His work On the Mysteries is a key text for understanding ancient theurgy, ritual practice, and the philosophical defense of divine communion.