As in the Old Testament era so it is in the New Testament era, a heart religion is needed in order to walk with the Lord. We find in our text for today that a person who is walking with Jesus under the new covenant, will walk in the light of the law. The writing of the law in the heart of the believer does not mean that the believer ignores the law, but instead the believer honors the Ten Commandments in every decision they make, due to a heart change. We notice from the text below that Paul quotes the Old Testament stating what was always needed is a heart change to do God’s will.
Hebrews8:7 For if that first [covenant] had been faultless, then should no place have been sought for the second.
8:8 For finding fault with them, he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah:
8:9 Not according to the covenant that I made with their fathers in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, and I regarded them not, saith the Lord.
8:10 For this [is] the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people: