Jeremiah 31:31-33
31 Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah:
32 Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the Lord:
33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.
In the New Covenant the Law of Elohim/God is Written on the Heart. The Law of Elohim/God can Only Be Written on the Heart if it is Practiced with Total Unfettered Devotion. The Law of Elohim/God Is the Law of Moses.