You are, of course wrong here. (Romans 2:13) and I think it is Matthew 5:17-18 where even Jesus tells us the truth of this matter. In another Jesus tells us that if we obey His commands, we love Him and in John 1:1-3 we learn that Jesus is the God of the Old Testament. Then it is imperative to note Mal. 3:6a. Jesus/God is the never changing God.