Book excerpt: This volume presents the first modern English translation of Iamblichus’s De mysteriis alongside the standard critical edition of the text by Édouard Des Places (Les Belles Lettres, 1966). This important work, which provides a unique insight into the mystical side of late Neoplatonism, has hitherto been neglected to an unfortunate degree, partly due to its inaccessibility. Iamblichus argues that the only true good is union with the gods and that the only route to this divine union is theurgy—religious ritual demonstrating supernatural power—which both symbolizes and encapsulates the extraordinary miracle of the soul’s conversion back to its divine origin. The process of sacrifice, the activities of angels and demons, the meaning of divine possession, and the functioning of oracles are all examined in this extraordinary defense of theurgic mysticism against contemporary critics such as Porphyry. Clarke, Dillon, and Hershbell bring this famous and fascinating text to light through their introduction and extensive notes.