This is the very reason that HITW would make a statement that according to your belief, God the Father must have been crucified with Jesus on the cross.
And here is his thinking. If God the Father and Jesus and the Holy Spirit are one God and they are made of the same substance, then this one God was crucified on the cross included all three of them.
That is incorrect.
Which means you need to explain how God the Father, who, according to the scriptures, abandoned Jesus on the cross, can be in a different place than Jesus and still be of the same substance.
I do recall you saying that being of the same substance does not mean They are one physically. So I took from that, that They could be of the same essence/substance and still be separate from each other, like in the case of the cross, and the baptism, or when Jesus says he is going to heaven, but will send the Holy Spirit to comfort you.
This is as simple as pointing out the difference between
ousia and
hypostasis, two terms used in the Creed. On this matter, I cannot hope to do any better than our father St. Basil of Caesarea, who distinguishes them in the following way:
The distinction between ousia and hypostases is the same as that between the general and the particular; as, for instance, between the animal and the particular man. Wherefore, in the case of the Godhead, we confess one essence or substance so as not to give variant definition of existence, but we confess a particular hypostasis, in order that our conception of Father, Son, and Holy Spirit may be without confusion and clear.
So God the Father, God the Son, and God the Holy Spirit share the same
ousia (the divine essence), but are different
hypostases (the Father is not the Son, the Son is not the Father, the Holy Spirit is not either, and neither are the Holy Spirit), in a way that is analogous to how all human beings share
the human nature, but that doesn't make each individual
the same person. I'm still me, you're still you, Ironhold's still Ironhold, Phoebe Ann is still Phoebe Ann, etc..
I also recall you made an analogy that humans are of the human essence, and their are millions of separate and distinct humans running around on the earth. Same with the Godhead, there are 3 in the Godhead and even though they are of the same essence, they are not physically one, but are physically separate and distinct. Am I getting this right?
See above. You are confusing essence/substance/ousia with hypostasis. And that distinction was not what I was even addressing
in that post; if you remember correctly, the point was to explain why the fathers used the term
ousia and not something else that is more concrete.
I hope this helps in some way.