Moreover the LORD your God will circumcise your heart and the heart of your descendants, to love the LORD your God with all your heart and with all your soul, so that you may live.
Deuteronomy 30:1-6 NASB
Israel has had a long history of departure from following the LORD God who has chosen and covenanted with them. The LORD Himself told Moses that this would indeed happen as they prospered in the land they were about to possess (Deuteronomy 31:15-22).
While the covenant God made with Abraham was an irrevocable covenant, the Mosaic covenant placed stipulations upon their ability to remain in the land. If they would depart from following the commandments of the LORD, He would scatter them as a nation. If they would then turn back to Him in repentance they would be restored back to the land promised to them.
In the above passage we find that God would do something that would enable them to walk faithfully in obedience to Him. The law itself could not ensure their faithfulness, they needed a change of heart, just like anyone of us do.
In a passage speaking of the return of Christ to bring Judgement upon an evil world we find this,
"A Redeemer will come to Zion, and to those who turn from transgression in Jacob," declares the LORD. "As for Me, this is My covenant with them," says the LORD: "My Spirit which is upon you, and My words which I have put in your mouth shall not depart from your mouth, nor from the mouth of your offspring, nor from the mouth of your offspring's offspring," says the LORD, "From now and forever."
Isaiah 59:20-21 NASB
It is interesting to note that this passage begins with an indictment against the nation of Israel, followed by a confession of their guilt, leading to the LORD Himself coming to bring vengeance to the wicked, and restoration to the repentant. At the end of this passage, which also foretells of the millennial age to come, we read that all of the nation will be righteous, and they will inhabit the land forever, planted by God Himself (Isaiah 59:1-60:22).
It is the "New Covenant" that provides the answer for man's rebellious tendency. All of us who have entered into this covenant through the new birth can attest to this fact. We have found that our lives have been transformed from slavery to sin, to a life of freedom to serve Christ in faithfulness.
We read of this New Covenant being made with the House of Israel and the house of Judah. Both kingdoms of the divided nation are mentioned here.
"Behold, days are coming," declares the LORD, "When I will make a new covenant with the house of Israel and the house of Judah, not like the covenant which I made with their father's in the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them," declares the LORD. "But this is the covenant which I will make with the house of Israel after those days," declares the LORD, "I will put My law within them and on their heart I will write it; and I will be their God, and they shall be My people. They will not teach again, each man his neighbor and each man his brother, saying, 'Know the LORD,' for they will all know Me, from the least of them to the greatest of them," declares the LORD, "For I will forgive their iniquity, and their sin I will remember no more."
Jeremiah 31:31-34 NASB
This is the answer to the dilemma posed by the stipulations in the Mosaic Covenant. God has made an irrevocable covenant concerning Israel and the land on the one hand, but has decreed that they must faithfully obey Him to remain in it.
Many people of Jewish descent have entered into this new covenant ever since the day of penecost two thousand years ago. And multitudes of gentile believers have been grafted in as well through their trust in Jesus Christ. However Israel as a nation has not entered as a whole. That day is yet to come, but make no mistake, it will.
"This says the LORD, who gives the sun for light by day and the fixed order of the moon and the stars for light by night, who stirs up the sea so that its waves roar, the LORD of hosts is His name: if this fixed order departs from before Me," declares the LORD, Then the offspring of Israel will also cease from being a nation before Me forever." Thus says the LORD, "If the heavens above can be measured and the foundations of the earth searched out below, then I will cast off all the offspring of Israel for all that they have done," declares the LORD.
Jeremiah 31:35-37 NASB
I think that many Christians fail to look at this section in its entirety. We see the new heart and the law written upon it, and that is true, and vital to our salvation, yet we fail to see that in this covenant God is once again pledging that Israel will always be His chosen people. He will not cast them away. He will allow the curse of the law to bring them to the end of themselves, where they will cry out to Him in repentance. At this point as we read in Isaiah 59:20, "A Redeemer will come to Zion, and to those who turn from transgression in Jacob," declares the LORD.
And then in the next chapter we read again of the New Covenant.
"Behold, I will gather them out of all the lands to which I have driven them in My anger, in My wrath and in great indignation; and I will bring them back to this place and make them dwell in safety. They shall be My people, and I will be their God; and I will give them one heart and one way, that they may fear Me always, for their own good and for the good of their children after them. I will make an everlasting covenant with them that I will not turn from them, to do them good; and I will put the fear of Me in their hearts so that they will not turn away from Me
I will rejoice over them to do them good, and will faithfully plant them in this land with all My heart and with all My soul. For thus says the LORD, 'Just as I brought all this disaster on this people, so I am going to bring on them all the good that I am promising them.'"
Jeremiah 32:37-42 NASB
As previously stated, Israel has faced periods of apostasy, driven out of the land, yet brought back into it years later. However, we have yet to see the day when they, as a nation, have one heart and purpose to serve the LORD their God with all their heart and soul. When that day comes we see the fulfillment of the New Covenant for them as God's chosen people. They will be regathered one final time, brought back to the land originally sworn to Abraham, and settled there never to be uprooted again.
The New Covenant is the capstone so to speak, of the previous covenants we have looked at. It brings to pass all that God has promised Israel. It confirms the covenant with Abraham, brings resolution to the blessings and curses of the law, and ushers in the Davidic kingdom. Look at Jeremiah 33:14-17, where we read that at the time of Israel's salvation, a righteous Branch of David will set up His kingdom, the ultimate fulfillment of the Davidic Covenant.
Finally I would like to look at a passage found in Ezekiel 36. A chapter where the desolation of the land of Israel is described, a desolation that occurs because of God's wrath towards His people on account of their rebellion against Him. I recommend you read the chapter in its entirety, as I will only quote part of it here.
Then the word of the LORD came to me saying, "Son of man, when the house of Israel was living in their own land, they defiled it by their ways and their deeds; their way before Me was like the uncleanness of a woman in her impurity. Therefore I poured out My wrath on them for the blood which they had shed on the land, because they had defiled it with their idols. Also I scattered them among the nations and they were dispersed throughout the lands. According to their ways and their deeds I judged them. When they came to the nations where they went, they profaned My holy name, because it was said of them, 'These are the people of the LORD; yet they have come out of His land.'
"But I had concern for My holy name, which the house of Israel had profaned among the nations where they went."
Ezekiel 36:16-21 NASB
God is a faithful and just God. He will not allow sin to go unchecked. There are consequences for sin. Sin among God's people is especially devastating, as it brings a reproach to the name of God as well. When the lost around us see sin and hypocrisy among those who profess to serve Christ it reflects upon Him. God will not tolerated that, judgement does begin in the house of the Lord (1 Peter 4:17).
Again, a dilemma. Does God destroy the nation on account of their sin? If He does, He is not faithful to the covenant made with Abraham, Isaac, and Jacob, yet as a holy God He must judge sin.
The context of the surrounding chapters in Ezekiel is the tribulation of the last days, culminating in the return of Christ to defeat "Gog" (the antichrist) at the Battle of Armageddon (see Ezekiel 38-39). At this point Israel has gone through an invasion that sparks the great tribulation, a time of unequaled distress that will come upon the world. Yet through this terrible event Israel will be brought to a place of repentance when their Messiah (Jesus) comes to deliver them from their enemies. The prophecy of Ezekiel 36 is set to occur at this point in time.
"Therefore say to the house of Israel, 'Thus says the LORD GOD, "It is not for your sake, O house of Israel, that I am about to act, but for My holy name, which you have profaned among the nations where you went. I will vindicate the holiness of My great name which has been profaned among the nations, which you have profaned in their midst. Then the nations will know that I am the LORD," declares the LORD GOD, when I prove Myself holy among you in their sight. For I will take you from the nations, gather you from all the lands and bring you into your own land. Then I will sprinkle clean water on you, and you will be clean; I will cleanse you from all your filthiness and from all your idols. Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh. I will put My Spirit within you and cause you to walk in My statutes, and you will be careful to observe My ordinances. You will live in the land that I gave to your forefathers; so you will be My people, and I will be your God."'"
Ezekiel 36:22-28 NASB
God will be vindicated through His deliverance of Israel from her enemies in the last days. All the nations who have come against Israel, will know that He is the LORD when Israel turns back to Him, and he brings them back into their land. His faithfulness to His covenant will be obvious to all. No one will be able to question Him from this point on. Israel will now live in peace, in obedience to their God forever, as a witness to the world around them.