[Ali Imran]

I've posted the answers above. Even without the later additions to St John's gospels, the description of the Holy Trinity is clear.

"Seek and you shall find"

If the Holy Trinity is clearly defined in the Gospels, it would not have taken 300 years of debating in many ecumenical councils to formulate the apostle creed.

Why did they have to forge the Trinity verse (1 John 5:7) more than a thousand years after Jesus's ascension? Because people were still arguing about the Trinity so they wanted to put it to bed. That's why they had to forge the Trinity verse to kill off all arguments. Remember Servetus? He was burned at the stake by the church for refusing to believe in the Trinity.