The Nestorians are followers of Nestorius (c. AD 386–451), who was Archbishop of Constantinople. Nestorianism is based on the belief put forth by Nestorius that emphasized the disunity of the human and divine natures of Christ. According to the Nestorians, Christ essentially exists as two persons sharing one body. His divine and human natures are completely distinct and separate. This idea is not scriptural, however, and goes against the orthodox Christian doctrine of the hypostatic union of Jesus, which states that Christ is fully God and fully man in one indivisible Person. God the Son, Jesus Christ, took on a human nature yet remained fully God at the same time. Jesus always had been God (John 8:58; 10:30), but at the Incarnation Jesus also became a human being (John 1:14).