No, the Nicene Creed is from three hundred years after Jesus's death. Three hundred years. That's a long time, especially when we're talking about word of mouth. Have you ever played the game "telephone"? Then it must be equally true that the Trinity is irrelevant. The words "trinity" and "hypostasis" appear nowhere in the NT. "Trinity" appears nowhere in the OT. Let me say it again: there is no doctrine of the trinity in either the OT or the NT. If you choose to interpret passages of either in terms of the Trinity, that's your business, but given that the Bible never uses the word Trinity, that interpretation is "speculation, not fact". On the contrary, I would like to see the evidence that any Christian before the fourth century talked about God as "one nature, three persons". Here are some suggestions where to start: in the first century, the books of the NT, the writings of Clement of Rome, the "apocryphal" books; in the second century, Ignatius, Irenaeus and Justin. In the third, Origen, Clement of Alexandria, Tertullian. Please show me where in their writings they use the formulation "one nature, three persons". If no one used this formulation for three hundred years after Jesus, how can you claim that it dates to "the earliest foundations of the church"?