Colossians 1:16
For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
Primary
What this passage establishes
All realms of creation were created in relation to Christ, through Him, and for Him.
Why it matters in the argument
Scripture says God created alone, then the New Testament places creation in Christ. The identity claim is stronger than merely saying Jesus assisted another Creator.
Apostolic connection
Because the LORD says He created by Himself, New Testament creation passages reveal Jesus within the identity of the one Creator.
Common misunderstanding
Language such as ‘by’ or ‘through’ does not require a second creator beside God; Scripture also describes God creating by His word, wisdom, power, and will.
How to use it in conversation
Pair an Old Testament ‘created alone’ passage with a New Testament passage that attributes creation to Christ.
Scripture connections
See which passages advance, clarify, or answer the argument