The Highway Forums General Discussion Theology Discussion Forum the New Covenant

Can someone make a quick, summary explanation of the New and Old covenants. I understand then, but I have been unable thus far to explain the difference to a Church of Christ friend (the extremely conservative church), who takes certain verses way too literally. For examples, the new covenant makes the old covenant obsolete, so we should disregard the old covenant teachings. He claims certain verses like Heb 7:12 does away with the Ten Commandments.

I probably should just stay away from him in discussing matters of theology as we come from entirely different systems. I don't think he has a system except certain verses override other passages.