“When God speaks of a “new” covenant, it means he has made the first one obsolete. It is now out of date and will soon disappear.” Hebrews 8:13
The intent of the New Covenant was to completely replace the first because it was aging and obsolete. After all, God found fault and set about to establish the new one based on better promises. We are not to live under both Law and grace. We solely live in the Covenant God instituted through Jesus Christ. The New Covenant is a covenant of grace. We need an understanding of grace. There is a teaching going around that because we live in a covenant of grace that we do not have to change anything in our lives when we come to Jesus. Everything can just remain the same. There are two types of grace; cheap grace and costly grace. Cheap grace means the justification of sin without the justification of the sinner. Cheap grace is grace without discipleship, without the cross, without Jesus Christ. Costly grace is the New Covenant. Costly grace is costly because it calls us to follow Jesus Christ. It is costly because it cost a man his life and it gives a man the only true life. It is costly because it condemns sin. It is costly because it cost God the life of His Son. It is costly because it compels a man to submit to the yoke of Jesus Christ and follow Him. This is an exciting and amazing truth! We are truly blessed to be a part of this wonderful covenant of grace based on better promises and guaranteed through Jesus Christ. God saved the best for last. The first is ready to disappear but our covenant will be a lasting and eternal memorial to our wonderful and faithful God.