Fairly simple: Where the NT verses say that Jesus and His Father are one, it meant it metaphorically, not literally. Where the OT scriptures say that the God of ancient Israel is one, it meant that was only one God of ancient Israel.
Fairly simple: Where the NT verses say that Jesus and His Father are one, it meant it metaphorically, not literally. Where the OT scriptures say that the God of ancient Israel is one, it meant that was only one God of ancient Israel.