5th century
Nestorianism
Christ’s divine and human natures are separated so sharply that He is treated almost as two persons.
The Central Error
The orthodox concern was that Nestorius divided the unity of Christ’s person while trying to protect the distinction of His natures.
Historic Response
Council of Ephesus, A.D. 431, amid the controversy over calling Mary Theotokos, “God-bearer.”
Modern Echoes
Speaking as though “Jesus the man” and “the Son of God” were separate subjects rather than one person with two natures.