The Trinity and all of its supporting doctrines are all circular in reasoning

[Runningman]

I've noticed much trinitarian error falls into two categories:

1) they make passages say more than they are intended to say
2) they assign nearly scriptural credence to non scripture. You mentioned a strong example in Athanasius, but I'm thinking also of early councils in general (which I believe often amounted to power plays which Jesus would have disapproved of) and modern majority opinion

I tend to give extra respect to church fathers of the first three centuries because they lived during times of heavy persecution and spoke Greek. But once Christianity became the official religion of Rome, I sometimes wonder if many would-be doctrine creators had, in a sense, "too much time on their hands" and came to prefer complex and mysterious doctrine with tenuous scriptural support such the trinity, inherited guilt, immaculate reception, along with many others.

All of them use non-Biblical philosophy and terminology that the Bible doesn't use. Try asking any trinitarian to discuss the trinity only using words and terminology the Bible uses. They can't do it because there isn't any support for the trinity. So they provide the philosophy, words, interpretations, etc. For example, terms like "incarnate" or "God the Son" or "hypostatic union" do not appear in the Bible. There wasn't even a concept of incarnating in Hebrew culture at their time. It was a completely foreign idea that there are no prophecies about.

 

[360watt]

All of them use non-Biblical philosophy and terminology that the Bible doesn't use. Try asking any trinitarian to discuss the trinity only using words and terminology the Bible uses. They can't do it because there isn't any support for the trinity. So they provide the philosophy, words, interpretations, etc. For example, terms like "incarnate" or "God the Son" or "hypostatic union" do not appear in the Bible. There wasn't even a concept of incarnating in Hebrew culture at their time. It was a completely foreign idea that there are no prophecies about.

If Jesus is God..the Holy Spirit is God
.the Father is God.. you have a Trinity.

Of course those terms such as hypostatic union aren't there..because they are names for a biblical teaching, that encompass other biblical terms. Just like if you were studying cooking and you saw a summary title for how some thing is cooked. Egg won't be in the title but it will be in the dish!

 

[FreeInChrist]

If Jesus is God..the Holy Spirit is God
.the Father is God.. you have a Trinity.

Of course those terms such as hypostatic union aren't there..because they are names for a biblical teaching, that encompass other biblical terms. Just like if you were studying cooking and you saw a summary title for how some thing is cooked. Egg won't be in the title but it will be in the dish!

The main trouble is that those Trinity deniers are not just denying that the word Trinity is not in the bible but they claim that
Jesus IS NOT God... because they themselves deny the verses that suggest He is, and that the Holy Spirit is not God because they always manage to twist things to seemingly say the Holy Spirit is the Spirit of God, a part of God, and as such is not the third in the Trinity.