A creed expresses what the church believes to be the truth of Sacred Scripture. An ecumenical creed expresses certain fundamental truths of Scripture which are held by most Christian churches throughout the world. Three of these ecumenical creeds—the Apostles’ Creed, Nicene Creed, and Athanasian Creed—are cited in Article 9 of the Belgic Confession as statements of truth which “we do willingly receive.” These ancient creeds express basic truths regarding the doctrine of the Holy Trinity over against various errors which surfaced in the early history of the New Testament church. To these three the Protestant Reformed Churches have added the Creed of Chalcedon (AD. 451), which sums the truth of the Person and Natures of the Lord Jesus Christ. Even though this creed is not mentioned by name in the Reformed confessions, it is included because the doctrine set forth in it is clearly embodied in Article 19 of the Belgic Confession.