2023 Reprint of the 1911 Edition. Full facsimile of the original edition and not reproduced with Optical Recognition Software. Theurgy, also known as divine magic, is one of two major branches of the magical arts, the other being practical magic or thaumaturgy. Theurgy describes the ritual practices associated with the invocation or evocation of the presence of one or more deities (also called "godforms"), especially with the goal of achieving henosis (uniting with the divine) and perfecting oneself. Theurgia is a work of Neoplatonic philosophy primarily concerned with ritual and theurgy and attributed to Iamblichus. It is mostly a reply by Iamblichus to criticisms by Porphyry, a contemporary. Iamblichus was a neoplatonic philosopher of Arab origin.