This chapter examines the Christian perspective on theurgy and divine communication, comparing it with Iamblichus’ system. Through analysis of Pseudo-Dionysius the Areopagite's On the Celestial Hierarchy, it reveals striking parallels between Christian hierarchical cosmology and Iamblichean ontological structures, despite Christianity's monotheistic framework. The examination demonstrates how Jesus Christ functions as the ultimate theurgist within Christian conception, mediating between humans and the divine through a celestial hierarchy remarkably similar to Iamblichus’ taxonomy. The discussion extends to Christian reinterpretation of divination practices and the concept of the personal daemon (transformed into the guardian angel), illustrating how Christianity effectively resignified pre-existing religious rituals while maintaining their essential function. By juxtaposing Iamblichean theurgy with emerging Christian religious practices, the chapter highlights a common intellectual thread: both systems sought to establish standardised frameworks for divine communication, resignifying traditional religious elements within their respective cosmological paradigms. This analysis contributes to our understanding of how competing late antique religious systems developed parallel strategies for religious authority and spiritual experience despite their apparent theological differences.