On the Incarnation of Christ: Against the Heretic Nestorius

St John Cassian's little treatise on the Incarnation is of a very different character his better-known works of spirituality, the Institutes and the Collations. Cassian wrote the De Incarnatione in 429, at the request of Leo, Archdeacon of Rome, as part of the build-up to the condemnation of Nestorius at the Synod of Rome in 430 and the general Council of Ephesus in 431. Leo was himself to become Pope in 440, and intervene conclusively in the next Christological crisis, the Monophysite over...