Kay

“You can believe what Grudem says when he says that Colossians 2:10 is about Jesus being the authority over all authorities (because head means authority over)…but surely given what has just been said in chap 1 that belittles Jesus. He does not just have authority over all authority, but in 1:16 it has been clearly said that he is the source/origin/beginning of all authority. Why would 2:10 mean anything less?”

Well put, Dave! – we can’t completely sever God into 3. Comps try making God into an image of their hierarchical human pyramid. As TL said, “No matter what is being done, all are involved to some degree.”