The reality here is that the early Church fathers, as well as the Church itself throughout its entire history and the Ecumenical Councils, held to the belief in the Trinity. The notion of the Trinity is found in the New Testament, albeit not literally written out. People have already allude to this verses in the thread here.
This is sort of the problem with sola scritura concept (disclaimer: I am Orthodox Christian), it holds that if something is not written in the New Testament canon, it does not exist. John makes it very clear that there is a lot more to our Faith than what is written in the Bible explicitly. The traditions of the early Church fathers and the way we worshipped, and the way the Trinity was understood should be considered. Of course, let me make clear, if any of the scriptures said the Trinity did not exist, and for some reason the Church practiced it, of course I would be against that.
Sorry about my English,God Bless all of you here on the forum.