What does 'modalism' say?Why do you keep arguing about the trinity? There is more than one trinity concept, there is something called Modalism, and you aren't explaining various verses that contradict your premise.
And why do the churches declare that the Trinity doctrine is 'a mystery in the strict sense' ie incoherent? (I agree with them, but they said it first.)
You clearly didn't read, or else didn't understand, what those quotes I gave you say. Jesus denies again and again that he's god. Paul agrees. If Jesus is not god, he's not part of the Trinity. End of story.'Trinity' is inferred from the text
I point out yet again that the Trinity doctrine was not invented til the latter 4th century CE. Don't take my word for it, look it up in a non-dogmatic history book. If there was an historical Jesus, he'd never heard of such a thing ─ it'd be pure anachronism.