Chapter 4 — Part I: The Creed — Article II: And in Jesus Christ, His Only Son, Our Lord
Section 23. Besides these terms, there are others common to both natures; as when in this Article of the Creed we say our Lord. If, then, this name applies to both natures, rightly is He to be called our Lord. For as He, as well as the Father, is the eternal God, so is He Lord of all things equally with the Father; and as He and the Father are not the one, one God, and the other, another God, but one and the same God, so likewise He and the Father are not the one, one Lord, and the other, another Lord.