For this is the covenant that I will make with the house of Israel after those days, declares the Lord: I will put my laws into their minds, and write them on their hearts, and I will be their God, and they shall be my people.
- Read Hebrews chapter 8
The book of Hebrews is helping us to understand that this new covenant is not only talking about “the house of Israel,” but about all people groups. It is a covenant written on the heart and not on tablets of stone.
In this new covenant, God takes his law and puts it in the mind and heart of his people. Notice that the writer does not say that in the new covenant, we are free to live apart from the law. No, he tells us that the law will become part of our innermost being because God himself puts it there. It becomes possible in the new covenant to obey the law, though imperfectly. The new covenant promises help from the Holy Spirit to live according to the law. This is why we are reformed. We believe that the law is our schoolmaster that leads us to the cross of Calvary. The law drives us to Christ. Then Christ pays our debts, forgives our transgressions, gives us the Holy Spirit, then points us back to the moral law so that we may do what is pleasing in his sight. We do not obey the law in order to earn some sort of favor or forgiveness from God. We can not! We obey the law because we want to out of love for the One who wrote it and forgives our sins for breaking it. The moral law is not just some arbitrary set of guidelines. It is a reflection of the heart and nature of God.