The New Covenant

What is the contrast here?

Jeremiah 31:31–32 ESV

“Behold, the 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 that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt, my covenant that they broke, though I was their husband, declares the Lord.

Let's look at the “I wills”.

Jeremiah 31:33–34 ESV

For this is the covenant that I will make with the house of Israel after those days, declares the Lord: I will put my law within them, and I will write it on their hearts. And I will be their God, and they shall be my people. And no longer shall each one teach his neighbor and each his brother, saying, ‘Know the Lord,’ for they shall all know me, from the least of them to the greatest, declares the Lord. For I will forgive their iniquity, and I will remember their sin no more.”

What is God saying here in poetic form?

Jeremiah 31:35–36 ESV

Thus 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 shall the offspring of Israel cease from being a nation before me forever.”

Jeremiah 31:37 ESV

Thus says the Lord: “If the heavens above can be measured, and the foundations of the earth below can be explored, then I will cast off all the offspring of Israel for all that they have done, declares the Lord.”