from a different perspective.
Paul/Saul, a greek raised wannabe pharasee [note he worked for the Saducee preists which NO self respecting pharasee of that day would do]. hallucinated a risen christ and preached him far and wide in the manner of the greek gnostics of the mystery schools of his day. The concept of the divine LOGOS or REASON was known in that time, the facalty by which the divine manifested creation, as John 1:1 puts it in distant echo of Pauls prior letter to the Colossians... The Jews seem to have NO concept of a trinity god and still reject such a notion except for some kaballahists who were influenced by mystery schools themselves... It seems no stretch to see that Paul mixes at times the roles of the god-man christ with the ultimate divine... which in the mystery schools was not alien and unreachable but the goal of all humans, where the god man role was the model of all to follow and aspire to... to be ONE with GOD as I am ONE with my father. [john 17:11,21].
Trinitarians often ignore the fact that NO ONE ever teaches the trinity to the jews who had no such concept and simply believe that they automatically understood trinitarian references which is utter stupidity on their part... since people ONLY read their own experiences into words, not the intentions of authors... and if the author does not teach a trinity he cannot expect anyone who does not believe in one to automatically find one in his words.... trinitarians are brainwashed to accept this alien to jewish thought concept of a trinity first and then it is very easy to see one in words which had nothing to do with one.