St Cyril of Alexandria and the Mysteries of Isis in De Adoratione

In his long, untranslated treatise De adoratione, Cyril of Alexandria interacts with the mysteries of Isis in two places. In one place he describes a ritual involving female initiates dressed in linen holding sistra and mirrors, and in another he describes the rotating of torches as a purification ritual, albeit without naming Isis in either. These passages enrich our understanding of the mysteries of Isis, and of Cyril's engagement with the cult beyond his purported actions at Menouthis. The passages also suggest why and how Alexandrian Christians engaged in Isiac practices, and show Cyril the bishop constructing a pastoral response to these practices.