The prophet Jeremiah lived from 626 to 585 BC.
The LORD said: The time will surely come when I will make a new agreement with the people of Israel and Judah.
It will be different from the agreement I made with their ancestors when I led them out of Egypt. Although I was their God, they broke that agreement.
Here is the new agreement that I, the LORD, will make with the people of Israel: "I will write my laws on their hearts and minds. I will be their God, and they will be my people.
"No longer will they have to teach one another to obey me. I, the LORD, promise that all of them will obey me, ordinary people and rulers alike. I will forgive their sins and forget the evil things they have done."
And this prophecy was fulfilled!
(Also recorded in Mark 14:24, Matthew 26:27-28.)
After the meal he took another cup of wine in his hands.
Then he said, "This is my blood. It is poured out for you, and with it God makes his new agreement.
(Paul wrote the Book of Romans 57 AD.)
The Holy Spirit will give you life that comes from Christ Jesus and will set you free from sin and death.
The Law of Moses cannot do this, because our selfish desires make the Law weak. But God set you free when he sent his own Son to be like us sinners and to be a sacrifice for our sin. God used Christ's body to condemn sin.
He did this, so that we would do what the Law commands by obeying the Spirit instead of our own desires