Hebrews 8:7-9

For if that first covenant had been faultless, no one would have looked for a second one.  But showing its fault, God says to them,“Look, the days are coming, says the Lord, when I will complete a new covenant with the house of Israel and with the house of Judah. “It will not be like the covenant that I made with their fathers, on the day when I took them by the hand to lead them out of Egypt, because they did not continue in my covenant and I had no regard for them, says the Lord.

Luke 22:20 says, “In the same way, after the supper he took the cup, saying, 'This cup is the new covenant in my blood, which is poured out for you.'" Jesus is speaking to His disciples at the last supper before enduring the cross unto death for our sins. In this way Jesus became the only possible atonement for our sins. He is the doorway to this new covenant, one that is by grace through faith in Him. The issue with the former covenant was that people did not remain faithful to God. At a glance it appears that problem cannot be solved, but God answered people’s disobedience with ruthless faithfulness and unfailing love through Christ Jesus. Christ now serves as a “once and for all” atonement until He returns. All are invited to believe upon Jesus, our High Priest forever in God’s new covenant with us.