Hi Dave.

You wrote: “We don’t need to assume that God created the universe, because the Bible does teach it.” Not true. The Bible doesn’t teach this (with regard to the Bible’s opening line). The Bible asserts this. Asserting something is not the same as teaching something. The issue here is understanding the distinction between simply asserting something and asserting something to be true (or false) by providing evidence to back up the statement in question (and showing it to be true or false). The other lines you cite do the same thing. “All things were made by him…” Oh? Where is the evidence for this? There isn’t any. It’s just another assertion.

Regarding your closing your paragraph, are you saying there’s extra-Biblical stuff regarding the opening lines of the Bible or were you referencing what you said about the Trinity? It’s not clear. No matter. In either case there is no extra-Biblical evidence to support either assertion.