there shall again be heard the voice of mirth and the voice of joy, the voice of the bridegroom and the voice of the bride, the voice of them that say, Give ye thanks unto Jehovah of hosts; for Jehovah is good, for his loving-kindness [endureth] for ever, of them that bring thanksgiving unto the house of Jehovah. For I will turn the captivity of the land as in the beginning, saith Jehovah.
Jeremiah 33:9 And it shall be to me a name of joy, a praise and a glory before all the nations of the earth, which shall hear of all the good that I do unto them; and they shall fear and tremble for all the good and for all the prosperity that I procure unto it.
Jeremiah 33:10 Thus saith Jehovah: In this place of which ye say, It is waste, without man and without beast! in the cities of Judah and in the streets of Jerusalem that are desolate, without man, and without inhabitant, and without beast,
Jeremiah 33:11 there shall again be heard the voice of mirth and the voice of joy, the voice of the bridegroom and the voice of the bride, the voice of them that say, Give ye thanks unto Jehovah of hosts; for Jehovah is good, for his loving-kindness [endureth] for ever, of them that bring thanksgiving unto the house of Jehovah. For I will turn the captivity of the land as in the beginning, saith Jehovah.
Jeremiah 33:12 Thus saith Jehovah of hosts: In this place which is waste, without man and without beast, and in all the cities thereof, there shall again be a habitation of shepherds causing [their] flocks to lie down.
Jeremiah 33:13 In the cities of the hill-country, in the cities of the lowland, and in the cities of the south, and in the land of Benjamin, and in the environs of Jerusalem, and in the cities of Judah, shall the flocks pass again under the hands of him that counteth [them], saith Jehovah.
The verse centers on "shall", "again", "heard", "voice", "mirth", and "bridegroom". It is saying that the verse draws attention to "shall" and "again", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 10's "Thus saith Jehovah In this place of..." into verse 12's "Thus saith Jehovah of hosts In this...", so "shall" and "again" 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 "again" with trust shaped by these words, not by a vague optimism outside the passage.