I could give pertinent verses that lead inconclusively to opinions. You probably know them. God does not answer the question directly. He has given us clues that men have used to come to a conclusion ... said conclusion not necessarily being true (precise). Aside: The definition we will ALWAYS struggle to understand a transcendent, infinite being.
Agreed, save we are not completely in the dark. He provides clues for some questions. Deut. 29:29
The 'experts' say God's word gives us the information we need for salvation and obedience (sufficiency of scripture). Granted the experts could be wrong.
Aside: sure not much about Christ in the old testament.
Aside2: You can talk to
for_his_glory about how people can be saved who never heard of Christ. Perhaps she can relate to you how people glean information from nature as to the essence of God (Aside: couldn't resist Ms. Glory)
I'm not a Christian historian. I know you have IMO extensive knowledge of the subject and I postulate you use it as a partial foundation in R.C. theology. Aside: Calvin was not first with these ideas. Augustine had similar doctrine.
Obviously, we disagree as to the doctrine of the apostles in these matters.
Anyways, God define His essence. He does so incompletely. Deut. 29:29
Aside: Covering same ground here IMO. I gave my fallible opinion.
Re: by saying "God just does" you are just repeating an empty platitude .... agreed, though that doesn't mean I am wrong ... that there is an answer.
I think you postulate that their must be an answer and the only answer put forward by Christians is the R.C. answer of the church is the means or mechanism of determining God's 'this or that'.
Re: There must be a means or mechanism ... I don't agree with this premise and can prove it logically IMO
Premise 1: God is transcendent
Premise 2: God is infinite in wisdom, knowledge, etc.
Premise 3: Only God knows himself (there a verse for that... too lazy to search)
Conclusion: 1 Corinthians 13:12 Thus we conclude that there is no means or mechanism to know all things in regard to God's essence (or maybe any aspect of God completely unless it can be reduced to simplistic knowledge like God knows 1 + 1 = 2
God's does not directly claim Arianism is a heresy directly. There is scripture that people use to indirectly show Arianism is a heresy. People are fallible, thus their opinions are fallible.