Chalcedonian Definition

Chalcedonian Definition

The Confession of Chalcedon (also Definition or Creed of Chalcedon), also known as the Doctrine of the Hypostatic Union or the Two-Nature Doctrine, was adopted at the Council of Chalcedon in 451 in Asia Minor. That Council of Chalcedon is one of the first seven Ecumenical Councils accepted by Eastern Orthodox, Catholic, and many Protestant Christian churches. It is the first Council not recognized by any of the Oriental Orthodox churches.

The Definition defines that Christ is 'acknowledged in two natures', which 'come together into one person and hypostasis'. The formal definition of 'two natures' in Christ was understood by the critics of the council at the time, and is understood by many historians and theologians today, to side with western and Antiochene Christology and to diverge from the teaching of Cyril of Alexandria, who always stressed that Christ is 'one'. However, the best modern analysis of the sources of the creed (by A. de Halleux, in Revue Theologique de Louvain 7, 1976) and a reading of the acts, or proceedings, of the council (recently translated into English) show that the bishops considered Cyril the great authority and that even the language of 'two natures' derives from him.