Iscool:
Perhaps you have reading comprehension problems. I never said the theological basis for the Holy Trinity were not in Sacred Scripture. However, what I did state was the Formal definition of the Holy Trinity is not in Sacred Scripture as the understandig of the Godhead was one that was highly contested and debated starting in the 2nd century with the appearance of gnosticsim, the early 3rd century with the appearance of Modalism [Sabellianism], Adoptionism, and moving to the 4th century we get into Arianism, etc and thus all of these theological debates resulted in the Church reflecting on the Scriptures and Tradition [i..e How the Church prayed and the consensus of the Church Fathers] to hammer out what was orthodox Trinitarian Doctrine and what was not.
Again, the theological basis for the Holy Trinity is in the Scriptures as Father, Son, and Holy Spirit are all mentioned. What is not formally defined is the relatioshhip among the 3 Divine Persons of Trinity as that was formally defined at the Councils of Nicea (325 AD) and Constantinopiile (381 AD).
In other words then, it's a wild guess...It's not an understanding, it's a decree...And it has no more meaning that what you or I may come up with to define and describe the Trinity...All that we know about the Trinity is in the scriptures, alone...