Jeremiah finds himself again in captivity by the king of Judah. The king is trying to limit the damage of Jeremiah's words by keeping him under lock and key as the siege of the Chaldeans takes place. If you look at the previous chapter you will see in vs. 2 that as the king of Babylon was besieging the city of Jerusalem Jeremiah was confined in the court of the guard. His own king puts him in prison even while the words that he is prophesying are coming true.
Today, as he is confined in the court of the guard, in this chapter he hears the Word of the Lord and God tells Jeremiah: "Call to me and I will answer you, and will tell you great and hidden things that you have not known." He again tells Jeremiah that the conquest will be complete. The reason it will be complete is because God has: "hidden my face from this city because of all their wickedness." But then he quickly transitions to a declaration that the fortunes will be restored.
Again, I see a parallel as he tells the people that in the streets of Jerusalem one day..."that are desolate, without inhabitants, human or animal, there shall once more be heard the voice of mirth and the voice of gladness, the voice of the bridegroom and the voice of the bride, the voices of those who sing, as they bring thank offerings to the house of the Lord."
I can't wait until the 18th of October. I so look forward to worshiping the Lord together in person and experiencing that return that is somewhat mentioned here in Jeremiah.