31 See, the days are coming, says the Lord, when I will make a new agreement with the people of Israel and with the people of Judah: 32 Not like the agreement which I made with their fathers, on the day when I took them by the hand to be their guide out of the land of Egypt; which agreement was broken by them, and I gave them up, says the Lord. 33 But this is the agreement which I will make with the people of Israel after those days, says the Lord; I will put my law in their inner parts, writing it in their hearts; and I will be their God, and they will be my people. 34 And no longer will they be teaching every man his neighbour and every man his brother, saying, Get knowledge of the Lord: for they will all have knowledge of me, from the least of them to the greatest of them, says the Lord: for they will have my forgiveness for their evil-doing, and their sin will go from my memory for ever.

35 These are the words of the Lord, who has given the sun for a light by day, ordering the moon and stars for a light by night, who puts the sea in motion, causing the thunder of its waves; the Lord of armies is his name. 36 If the order of these things before me is ever broken, says the Lord, then will the seed of Israel come to an end as a nation before me for ever.

Matthew Henry's Commentary on Jeremiah 31:31-36

Commentary on Jeremiah 31:27-34

(Read Jeremiah 31:27-34)

The people of God shall become numerous and prosperous. In Hebrews 8:8,9, this place is quoted as the sum of the covenant of grace made with believers in Jesus Christ. Not, I will give them a new law; for Christ came not to destroy the law, but to fulfil it; but the law shall be written in their hearts by the finger of the Spirit, as formerly written in the tables of stone. The Lord will, by his grace, make his people willing people in the day of his power. All shall know the Lord; all shall be welcome to the knowledge of God, and shall have the means of that knowledge. There shall be an outpouring of the Holy Spirit, at the time the gospel is published. No man shall finally perish, but for his own sins; none, who is willing to accept of Christ's salvation.

Commentary on Jeremiah 31:35-40

(Read Jeremiah 31:35-40)

As surely as the heavenly bodies will continue their settled course, according to the will of their Creator, to the end of time, and as the raging sea obeys him, so surely will the Jews be continued a separate people. Words can scarcely set forth more strongly the restoration of Israel. The rebuilding of Jerusalem, and its enlargement and establishment, shall be an earnest of the great things God will do for the gospel church. The personal happiness of every true believer, as well as the future restoration of Israel, is secured by promise, covenant, and oath. This Divine love passes knowledge; and to those who take hold upon it, every present mercy is an earnest of salvation.