“Theurgy, on the other hand was a theion ergon, a ‘work of the gods’ capable of transforming man to divine status. Although the term theourgia, originated with second century Platonists to describe the deifying power of the Chaldean rituals–some if which were believed to be transmitted by the soul of Plato himself–it was Iamblichus who provided a scientific rationale for the performance of these rites and ensured that Theurgy would become an internal part of the Platonic vocabulary.”

Theurgy and the soul, the neoplatonism of Iamblichus by Gregory Shaw