This was in response to Kathy saying that her source of ultimate authority was Christ and the Holy Spirit. She mentioned nothing about the sufficiency of Scripture and the doctrine of sola Scriptura. So, I was trying to probe further.

I agree with you that we are able to formulate a doctrine such as the Trinity using the text of Scripture. I also have absolutely nothing against confessions.
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True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin