Jeremiah, was dedicated to his ministry to the point of getting beat up, mistreated , and thrown in a ditch. His message was the forcoming judgement of God’s people because of there disobedience and disbelief. His ministry also included massianec prophecies of the coming of our Lord Jesus Christ.
In conclusion, God gives us warning before the fall. Therefore if you have sin in your heart repent and come clean with God. He is faithful to forgive you and make you whole again.
Lamentation reminds me of His eternal love. Even in His anger and wrath he does not allow the enemy to wipe us out completely. His comparisons never fails and His mercy is new every morning.