Mark 12:32
And the scribe said unto him, Well, Master, thou hast said the truth: for there is one God; and there is none other but he:
And the scribe said unto him, Well, Master, thou hast said the truth: for there is one God; and there is none other but he:
The scribe affirms Jesus’ answer: there is one God and no other but He.
This establishes the controlling biblical confession: every later passage about Father, Son, and Holy Ghost must be read without multiplying the one God.
Apostolic teaching begins with the Bible’s own insistence that God is one indivisible divine being, then reads the incarnation as that one God revealed in Christ.
Counting titles, manifestations, or relational language does not overturn the Bible’s explicit statements that God is one and alone.
Start here before discussing difficult relational texts. Establish what Scripture says plainly about how many are God.