The crux of our discussion comes from us trying to describe spiritual concepts with merely human words. You aren't going to be able to understand this without the help of the Spirit.
To my friends who ascribe to the Nicene Creed and the Trinity: I am glad you have a single word that you can use to help understand these concepts. Remember that this doctrine is not essential for salvation nor is it needed to ascribe to the various concepts you put under this umbrella term.
To my friends who object to the use of the Nicene Creed and/or the Trinity. Neither of these will disqualify your salvation. Look beyond the terms to the underlying truths therein.
It is my humble opinion that God will bless those that seek him and how to do his will. All too often we want to insert legalism into the mix in our attempt to codify God. Consider these passages in John:
John 14:5 Thomas said to him, "Lord, we don't know where you are going, so how can we know the way?" 6 Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me. 7 If you really knew me, you would know my Father as well. From now on, you do know him and have seen him."
8 Philip said, "Lord, show us the Father and that will be enough for us."
9 Jesus answered: "Don't you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, 'Show us the Father'? 10 Don't you believe that I am in the Father, and that the Father is in me? The words I say to you are not just my own. Rather, it is the Father, living in me, who is doing his work. 11 Believe me when I say that I am in the Father and the Father is in me; or at least believe on the evidence of the miracles themselves. 12 I tell you the truth, anyone who has faith in me will do what I have been doing. He will do even greater things than these, because I am going to the Father. 13 And I will do whatever you ask in my name, so that the Son may bring glory to the Father. 14 You may ask me for anything in my name, and I will do it. NIV
Here Jesus is pointing out just how interconnected he and the Father are. If you have seen Jesus, you HAVE seen the Father. This is not a quantum leap by any means and it gets down to phusis. BTW, though it's not germane to the current discussion, verse 12 is probably the STRONGEST promise in the scriptures.
So what is phusis? It's the Greek word for "nature". My phusis is to be a human being. My sweet snuggling kitty's phusis is to be a feline. Any item may have various attributes, but those attributes together define the phusis (nature) of an object.
It is also my humble opinion that God is pan-dimensional. God the Father is Spiritual. God the Son is Physical and God the Spirit is cerebral (in our conscience).
John 14:15 "If you love me, you will obey what I command. 16 And I will ask the Father, and he will give you another Counselor to be with you forever 17 the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be in you. 18 I will not leave you as orphans; I will come to you. 19 Before long, the world will not see me anymore, but you will see me. Because I live, you also will live. 20 On that day you will realize that I am in my Father, and you are in me, and I am in you. 21 Whoever has my commands and obeys them, he is the one who loves me. He who loves me will be loved by my Father, and I too will love him and show myself to him." NIV
So the Spirit is now God living in ME. The Spirit's Phusis is God. Now we know from James that God is love. Now watch as we come full circle with that concept.
John 15:9 "As the Father has loved me, so have I loved you. Now remain in my love. 10 If you obey my commands, you will remain in my love, just as I have obeyed my Father's commands and remain in his love. 11 I have told you this so that my joy may be in you and that your joy may be complete. 12 My command is this: Love each other as I have loved you. 13 Greater love has no one than this, that he lay down his life for his friends. 14 You are my friends if you do what I command. 15 I no longer call you servants, because a servant does not know his master's business. Instead, I have called you friends, for everything that I learned from my Father I have made known to you. 16 You did not choose me, but I chose you and appointed you to go and bear fruitfruit that will last. Then the Father will give you whatever you ask in my name. 17 This is my command: Love each other.NIV
Now, someone mentioned Philippians 2 which is a GREAT passage since it uses the word Phusis in it more than once. Again, we can see easily how they came up with the concept of the Trinity here:
Philippians 2:5 Your attitude should be the same as that of Christ Jesus:
6 Who, being in very nature God,
did not consider equality with God something to be grasped,
7 but made himself nothing,
taking the very nature of a servant,
being made in human likeness.
8 And being found in appearance as a man,
he humbled himself
and became obedient to death
even death on a cross!
9 Therefore God exalted him to the highest place
and gave him the name that is above every name,
10 that at the name of Jesus every knee should bow,
in heaven and on earth and under the earth,
11 and every tongue confess that Jesus Christ is Lord,
to the glory of God the Father. NIV
By phusis (nature) Jesus IS God. He did not have to grasp it, for he IS GODl So he also became by phusis (nature) MAN as well. Why? So he could become the PERFECT sacrifice for everyone.