Definition of Chalcedon 1.3

Chapter 1 — The Definition of Faith

Section 3. one and the same Christ, Son, Lord, Only-begotten, made known in two natures without confusion, without change, without division, without separation; the difference of the natures being in no way removed because of the union, but rather the properties of each nature being preserved, and both concurring into one person and one subsistence — not parted or divided into two persons, but one and the same Son and Only-begotten God, Word, Lord, Jesus Christ;