The trinity has so many issues when you test it against scripture that you have to create even more doctrines to fix these problems. After the doctrine of the trinity was created they had to continue to add these sub doctrines, a doctrine for the doctrine. One of these sub doctrines is the hypostatic union. I was talking to another guy here explaining these problems but no matter how I explained them he refused to acknowledge they were there.
These are the problems you get into with all this. The trinity says three persons in one nature, then you get the hypostatic union claiming two natures in one person. Already we see an inconstancy, one nature, but now two natures?
Within the one being you have two natures with each nature contradicting the other, finite/infinite, eternal/contingent, natural/supernatural, corporeal/non-corporeal, mortal/immortal, omniscience/limited knowledge, perfect/sinful, etc.
you have the simple common sense problems, Jesus was the Most High but He was 100% man, this means man can go into the heavens, create the heavens, the planets, and the rest, but man can not do these things.
The trinity does not stand the test against scripture, such as Jesus teaching the Father is greater than the Son,so you add more doctrines to fix the this, add the HU and now the teaching becomes, the Father is NOT greater than the Son. if this succeeds in fixing the the issues ok but now you have a new set of problems that the new doctrine creates such as Jesus did not say the Father if NOT greater.
Then you have additional groups attempting to deal with these problems and they all lead to heresy, Docetism, Arianism, Modelism, and the rest. No answer can be found, no one can explain it, the church is left with throwing their arms up in frustration and claiming its a “mystery of the faith” when you hear someone say this statement it means your asking to many questions. With all these problems and frustration the church was left with no choice but to start burning people alive.
None of these things make sense and there is little in scripture to support. Whatever is in scripture to support these things they are far out weighed by the scriptures against.
If someone want to believe in these things, if they think it helps them in their relationship with the Most High, they should continue believing, but I think its a bit far fetched to say someone MUST BELIEVE with all these problems that can not be explained.