Therefore they shall come and sing in the height of Zion, and shall flow together to the goodness of the LORD, for wheat, and for wine, and for oil, and for the young of the flock and of the herd: and their soul shall be as a watered garden; and they shall not sorrow any more at all.
Jeremiah 31:10 Hear the word of the LORD, O ye nations, and declare it in the isles afar off, and say, He that scattered Israel will gather him, and keep him, as a shepherd doth his flock.
Jeremiah 31:11 For the LORD hath redeemed Jacob, and ransomed him from the hand of him that was stronger than he.
Jeremiah 31:12 Therefore they shall come and sing in the height of Zion, and shall flow together to the goodness of the LORD, for wheat, and for wine, and for oil, and for the young of the flock and of the herd: and their soul shall be as a watered garden; and they shall not sorrow any more at all.
Jeremiah 31:13 Then shall the virgin rejoice in the dance, both young men and old together: for I will turn their mourning into joy, and will comfort them, and make them rejoice from their sorrow.
Jeremiah 31:14 And I will satiate the soul of the priests with fatness, and my people shall be satisfied with my goodness, saith the LORD.
The verse centers on "therefore", "shall", "come", "sing", "height", "zion", and "flow". It is saying that the verse draws attention to "therefore" and "shall", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "For the LORD hath redeemed Jacob and..." into verse 13's "Then shall the virgin rejoice in the...", so "therefore" and "shall" 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 "therefore" and "shall" with trust shaped by these words, not by a vague optimism outside the passage.