Is a voice of joy and a voice of gladness, Voice of bridegroom, and voice of bride, The voice of those saying, Thank Jehovah of Hosts, for Jehovah <FI>is<Fi> good, For His kindness <FI>is<Fi> to the age, Who are bringing in thanksgiving to the house of Jehovah, For I turn back the captivity of the land, As at the first, said Jehovah.
Jeremiah 33:9 And it hath been to Me for a name of joy, For praise, and for beauty, to all nations of the earth, Who hear of all the good that I am doing them, And they have feared, And they have trembled for all the good, And for all the peace, that I am doing to it.
Jeremiah 33:10 Thus said Jehovah: Again heard in this place of which ye are saying, Waste it <FI>is<Fi> , without man and without beast, In cities of Judah, and in streets of Jerusalem, That are desolated, without man, And without inhabitant, and without beast,
Jeremiah 33:11 Is a voice of joy and a voice of gladness, Voice of bridegroom, and voice of bride, The voice of those saying, Thank Jehovah of Hosts, for Jehovah <FI>is<Fi> good, For His kindness <FI>is<Fi> to the age, Who are bringing in thanksgiving to the house of Jehovah, For I turn back the captivity of the land, As at the first, said Jehovah.
Jeremiah 33:12 Thus said Jehovah of Hosts: Again there is in this place--that is waste, Without man and beast, And in all its cities--a habitation of shepherds, Causing the flock to lie down.
Jeremiah 33:13 In the cities of the hill-country, In the cities of the low country, And in the cities of the south, And in the land of Benjamin, And in the suburbs of Jerusalem, And in the cities of Judah, Again doth the flock pass by under the hands of the numberer, said Jehovah.
The verse centers on "voice", "gladness", and "bridegroom". It is saying that the verse draws attention to "voice" and "gladness", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 10's "Thus said Jehovah Again heard in this..." into verse 12's "Thus said Jehovah of Hosts Again there...", so "voice" and "gladness" 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 "voice" and "gladness" with trust shaped by these words, not by a vague optimism outside the passage.