I don’t see this as harmonization but rather as the authority of Jesus to interpret scripture for us. In his day, as in ours, the same scriptures inspire multiple schools of interpretation. But God commands us to listen to his Son.
5 While he was still speaking, suddenly a bright cloud overshadowed them, and from the cloud a voice said, "This is my…www.biblegateway.com
I think what we see in the New Testament is a re-interpretation of the Hebrew scriptures according to the person and career of Jesus.
This is an ongoing exploration for me. I don’t know quite how to treat the Bible or the Old Testament, but I’m learning bit by bit.