ummm the OT was NEVER done away with! Afterall, EVERY text Jesus and the apostles quote was from the OLD TESTAMENT because the NEW TESTAMENT didn't even exist at the time! If you do away with the OT you do away with over 50% of the NT!! The old covenant was done away with. The old covenant was having to take lambs to the sanctuary, confess your sins on them, slay them, do the Day of Atonement and other feast days, etc. JESUS did away with that! it was nailed to the cross! Jesus FULFILLED the ceremonial law! He WAS the lamb slain from the foundation of the world! All the ceremonial laws pointed FORWARD to Jesus and what he would accomplish for us on the cross, but it did NOT do away with the writings of the Old Testaments, of which MOST is prophecies about Jesus and even things that will happen at the end of time!