For catechumens and baptized believers alike, the Nicene Creed reveals the identity of the godhead (Father, Son, and Holy Spirit) but also shows what God has done for the world. Though Arius (256-336) strayed from orthodoxy in his description of the relationship of the Father and the Son, his initial inquiry, which the Nicene Creed ultimately answered, was actually a question of mission. What do the Father, Son, and Holy Spirit—uniquely and collectively—do in the work of salvation? Near the center of the Creed, the Nicene Fathers declared the missional purpose of the Son’s incarnation: “For us and our Salvation / He came down from heaven.” In this paper, I will explore the missional impetus and nature of the Nicene Creed for the fourth-century church and the global church today.