Passage
And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
Nearby Context
Jeremiah 31:32 Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the LORD:
Jeremiah 31:33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.
Jeremiah 31:34 And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
Jeremiah 31:35 Thus saith the LORD, which giveth the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, which divideth the sea when the waves thereof roar; The LORD of hosts is his name:
Jeremiah 31:36 If those ordinances depart from before me, saith the LORD, then the seed of Israel also shall cease from being a nation before me for ever.
Study Lenses
The verse centers on "shall", "teach", "neighbour", "brother", "saying", "lord", and "least". It is saying that the verse draws attention to "shall" and "teach", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 33's "But this shall be the covenant that..." into verse 35's "Thus saith the LORD which giveth the...", so "shall" and "teach" belong inside that flow. In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "shall" and "teach" with trust shaped by these words, not by a vague optimism outside the passage.