In verses 8-12, Paul quotes from Jeremiah 31:31-34. The writer begins by telling us that God found fault with the men of old, and this leads to the quotation from Jeremiah 31 in Hebrews 8:8.
From the failures of the past, Jeremiah turned his vision to the future. There are four significant things prophesied by Jeremiah and quoted by Paul about the new covenant in verses 10-12:
First, the New Covenant is inward and dynamic: It is written on the hearts and minds of the people. A shortcoming of the Old had been its outwardness. It had divinely given laws, but it was written on tablets of stone. Jeremiah looked for a time when people would not simply obey an external code but would be so transformed that God's own laws would be written in their inmost beings.
Second, there is a close relationship between the God who will be "their God" and the people, he says, who will be "My people." The change from the Old Covenant to the New Covenant is that while the formula of the covenant remains the same from age to age, it is capable of being filled with fresh meaning to a point where it can be described as a "new" covenant. "I will be your God" acquires fuller meaning with every further revelation of the character of God.
Third, all who enter it will have knowledge of God. There will be no need for a person to instruct his neighbor. The word rendered neighbor in verse 11 means "citizen," and thus a "fellow-citizen." Jeremiah moves from the wider relationship in the community to the narrower relationship in the family, saying that in neither case will there be a need to exhort anyone to know God because everyone will know Him.
This does not mean that under the conditions of the New Covenant there will be no place for a teacher. There will always be the need for those who have advanced in the Christian way to pass on to others the benefit of their knowledge. Rather, the meaning is that the knowledge of God will not be confined to a privileged few (as with the priesthood of ancient Israel). All those under the New Covenant will have their own intimate and personal knowledge of their God.
Fourth, under the New Covenant, sins are forgiven. Following repentance of sins and acceptance of the sacrifice of Jesus Christ, sins are forgiven. The superior sacrifice of Christ is offered once and for all, paying the penalty of sin for those who repent.
Martin G. Collins
The Law's Purpose and Intent
There indeed was a fault: "finding fault with them." Them is a plural pronoun, so it cannot possibly refer to the singular noun covenant. It would have to have read "for finding fault with it." God's Word is telling us—not completely yet—that the fault was with a plural them.
John W. Ritenbaugh
The Covenants, Grace, and Law (Part 10)
As early as the seventh century BC, during the lifetime of the prophet Jeremiah, God assured humanity that He had prepared a new covenant, which was ready to be presented and ratified between God and men. The specific time of its institution was not revealed then, only that He would make it with a reunited Israel and Judah. However, the Bible shows that God did not wait for physical Israel and Judah's reunification into one nation, but instead, He introduced the New Covenant into the Christian church as a precursor agreement through and under Jesus Christ as the church began. This was part of God's Plan, and He is continuing to use its standards to prepare a people within the present-day church to fulfill its operations under Jesus Christ when Israel and Judah reunite after His return (Revelation 14:1-5).
The New Testament teaches that the Temple sacrifices and ceremonies commanded under the Old Covenant are indeed set aside. But God's setting aside of the ceremonial focus, as explored and expounded in the epistle to the Hebrews, does not automatically do away with any other laws dealing with public and private behavior relating to loving God with all our heart, soul, and mind, and our neighbor as ourselves.
God's institution of the New Covenant within the church has been a more intimate and effective guide for producing higher-quality relationships with Him and His Family than the Old Covenant. When combined with His appointment of Jesus Christ as our spiritual High Priest, this system features a personal, anytime, all-the-time relationship with Him that enhances the creation of the spiritual characteristics that God desires in His children. These elements allow us access to God that those under the Old Covenant did not have. We can approach Him anytime through Christ!
Much of the book of Hebrews is, according to chapter 8, focused on Jesus Christ's qualifications for fulfilling His responsibilities within the spiritual process that God has instituted under the New Covenant. Jesus Himself teaches us about our vital need of Him in John 15:4-6.
The close intimacy of the relationship with Jesus Christ that the New Covenant provides for us makes it extremely valuable to us. In turn, our spiritual relationship with the Father and Son influences our life's activities. His role is to assist us in making good spiritual use of the gifts God has made available to us when we accepted the New Covenant (Romans 5:1-5). Our goal now is to bring glory to God by yielding to His creative genius and power as we live our lives, being formed into Christ's character image. Jesus Christ never sinned. It is this quality of righteous living that honors the Father. Thus, we are called to walk in the steps of our Savior. Peter writes in I Peter 2:21-22, “For to this you were called, because Christ also suffered for us, leaving us an example, that you should follow His steps: 'Who committed no sin, nor was deceit found in His mouth.'”
The New Covenant does not abolish the Ten Commandments at all. Jesus' life proves that. We are to follow what He did. God's appointment of Jesus Christ as High Priest to aid us and His institution of a more effective system for preparing us for His Kingdom removed the typical Temple system of animal sacrifices and ceremonies. He replaced them with the far superior personal, individual, and spiritual attentions of Jesus Christ. At the same time, in the Sermon on the Mount, Jesus raises our behavioral responsibilities, teaching us to keep the commandments in their spirit. This elevated standard makes them more refining and restraining than they are in the mere letter.
John W. Ritenbaugh
Why Hebrews Was Written (Part Two)
These verses outline some major objectives within the workings of the New Covenant. Merciful forgiveness for breaking God's laws is a major one. The author provides an intriguing overview of God's objectives using the means of the New Covenant as His tools. This overview provides a clear statement that God will be an even more hands-on Creator, working in His people's behalf more than ever before. It clearly states that law-keeping and sinlessness are major objectives in its institution, giving no indication of any kind that moral laws are being “done away.”
The excitement is building toward seeing what He will lead each of us to become in our lives. It should be abundantly clear that God's law will be a primary tool in creating us into the image of Jesus Christ so that throughout eternity we are prepared to follow Him wherever He goes, and He kept God's laws perfectly.
John W. Ritenbaugh
Why Hebrews Was Written (Part One)
Other Forerunner Commentary entries containing Hebrews 8:7: