Introduction – Where is the Trinity?

In the 27 books of the New Testament (NT), the core doctrine is said to be the Trinity, according to most Protestant, Catholic, and non-denominational churches. If that is true, then the doctrine should be prolific, and abundantly clear. Where is the Trinity in the Bible, particularly the New Testament?
Mark 12:29 – “Jesus answered, “The foremost is, ‘HEAR, O ISRAEL! Yahweh OUR GOD IS ONE Yahweh”‘” (LSB margin). Jesus quoted Deuteronomy 6:4 in reference to the greatest commandment of all. But, according to this, Yahweh God is only one Yahweh. How can this be?


