You can easily understand Jeremiah’s lament-
My grief is beyond healing, my heart is sick within me. Hark, the cry of the daughter of my people from the length and breadth of the land: “Is the LORD not in Zion? Is her King not in her?” “Why have they provoked me to anger with their graven images, and with their foreign idols?” “The harvest is past, the summer is ended, and we are not saved.” For the wound of the daughter of my people is my heart wounded, I mourn, and dismay has taken hold on me. Is there no balm in Gilead? Is there no physician there? Why then has the health of the daughter of my people not been restored? O that my head were waters, and my eyes a fountain of tears, that I might weep day and night for the slain of the daughter of my people! O that I had in the desert a wayfarers’ lodging place, that I might leave my people and go away from them! For they are all adulterers, a company of treacherous men.
And then it becomes Divine speech-
They bend their tongue like a bow; falsehood and not truth has grown strong in the land; for they proceed from evil to evil, and they do not know me, says the LORD.
Let every one beware of his neighbor, and put no trust in any brother; for every brother is a supplanter, and every neighbor goes about as a slanderer.
Every one deceives his neighbor, and no one speaks the truth; they have taught their tongue to speak lies; they commit iniquity and are too weary to repent.
Heaping oppression upon oppression, and deceit upon deceit, they refuse to know me, says the LORD.
Therefore thus says the LORD of hosts: “Behold, I will refine them and test them, for what else can I do, because of my people?
Their tongue is a deadly arrow; it speaks deceitfully; with his mouth each speaks peaceably to his neighbor, but in his heart he plans an ambush for him.
Shall I not punish them for these things? says the LORD; and shall I not avenge myself on a nation such as this?
“Take up weeping and wailing for the mountains, and a lamentation for the pastures of the wilderness, because they are laid waste so that no one passes through, and the lowing of cattle is not heard; both the birds of the air and the beasts have fled and are gone.
I will make Jerusalem a heap of ruins, a lair of jackals; and I will make the cities of Judah a desolation, without inhabitant.”
Who is the man so wise that he can understand this? To whom has the mouth of the LORD spoken, that he may declare it? Why is the land ruined and laid waste like a wilderness, so that no one passes through? (Jer. 8:18-9:12)