Psalm 83:18
That men may know that thou, whose name alone is JEHOVAH, art the most high over all the earth.
What this passage establishes
The covenant name belongs to the One who alone is Most High over the earth.
Why it matters in the argument
This establishes the controlling biblical confession: every later passage about Father, Son, and Holy Ghost must be read without multiplying the one God. In Scripture, the divine name carries God’s identity, authority, presence, and saving action. The New Testament centers that saving revelation in Jesus.
Apostolic connection
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. Jesus is not a competing name beside the Father; His name is the saving name in which the one God has made Himself known and acted for redemption.
Common misunderstanding
Counting titles, manifestations, or relational language does not overturn the Bible’s explicit statements that God is one and alone. Calling on Jesus’ name is not a verbal charm. It is an obedient appeal to His identity, authority, and saving work.
How to use it in conversation
Use the LORD’s exclusive identity as the starting point, then follow how the New Testament reveals salvation and divine authority in the name of Jesus.