For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
This means that after some time, God promises to the family of Israel that he will place his rules within their thoughts and write them in their hearts. He will then be their God and they will be his people.