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1) Where in the Scriptures does it say that the new covenant places the old? I state this respectfully, you are giving an opinion and you are not sure about it because according to Psalm 89:34 God clearly states the following... "my covenant will I not break, nor alter the thing that is gone out of my lips." In other words, God couldn't have replace the old covenant with a new covenant, right? Also, keep this in mind, the old covenant had nothing to do with making a man God's righteousness.
2nd Corinthians 3... What was written in stone was glorious, Yes or No? If Yes, what exceed it now? What makes them done away with?
Galatians 3... Please elaborate you view on this verse.