Vico:
It is revealed in the Gospel. Gospel of John 8:58, Gospel of John 10:30, Gospel of John 14:9-10, Gospel of John 14:26-27, Gospel of John 15:26, Gospel of Luke 1:35.
We are getting off-topic. However, please note there are just as many biblical quotes that contradict the Trinity as there are that support it. Examples include John 14:28, Luke 22:42, among many others. Also, some of the verses you quote are used AGAINST your position. for example, John 10:30, “I and the Father are one” is claimed to show that Jesus is NOT distinct from the Father.
The point of all this is that if you try to find truth of the Trinity in the Bible, you will not find it. It is too contradictory, written by multiple authors with different agendas across decades.
And, regardless, I am talking about the historicity of the Trinity, not the theological foundation of it. It is historical fact that the doctrine of the Trinity was not part of Christianity until 300 years after Jesus died, named and defined by a committee. Whether this group of men were divinely inspired is, I guess, subjective - but the historical truth is not in question. The truth is that no where in the Bible is the word, concept or doctrine of the Trinity ever stated directly, if even implied. This lack of direct evidence in the Bible is why Arianism arose. I am not advocating one view versus another here - but I am pointing out it is worthwhile to consider the history of the doctrine, and irresponsible to pretend otherwise.