This general view
finds its fullest and clearest New Testament expression in the Fourth Gospel, was elaborated in the great creedal discussions of
several centuries later, and was finally and definitively formulated by the Council of Chalcedon in 451: «One and the same Christ, Son, Lord, only begotten, acknowledged in two natures, without confusion, without change, without division, without separation; the
distinction of the natures being by no means taken away because of the union, but rather the property of each nature being preserved and concurring in one person.