They will no longer each teach his neighbor, and every man teach his brother, saying, ‘Know Yahweh;’ for they will all know me, from their least to their greatest,” says Yahweh: “for I will forgive their iniquity, and I will remember their sin no more.”
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 covenant of mine they broke, although I was a husband to them,” says Yahweh.
Jeremiah 31:33 “But this is the covenant that I will make with the house of Israel after those days,” says Yahweh: I will put my law in their inward parts, and I will write it in their heart. I will be their God, and they shall be my people.
Jeremiah 31:34 They will no longer each teach his neighbor, and every man teach his brother, saying, ‘Know Yahweh;’ for they will all know me, from their least to their greatest,” says Yahweh: “for I will forgive their iniquity, and I will remember their sin no more.”
Jeremiah 31:35 Yahweh, who gives the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, who stirs up the sea, so that its waves roar; Yahweh of Armies is his name, says:
Jeremiah 31:36 “If these ordinances depart from before me,” says Yahweh, “then the offspring of Israel also will cease from being a nation before me forever.”
The verse centers on "longer", "each", "teach", "neighbor", "brother", "saying", and "yahweh". It is saying that the verse draws attention to "longer" and "each", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 33's "But this is the covenant that I..." into verse 35's "Yahweh who gives the sun for a...", so "longer" and "each" 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 "longer" and "each" with trust shaped by these words, not by a vague optimism outside the passage.