Jeremiah - Known as the "weeping prophet" because of the anguish he felt for his people, both for their sin and their punishment; and for the desolation of Jerusalem by the Babylonians.  His book, Lamentations, epitomizes the sorrow of his ministry.

"My soul, my soul!  I am in anguish!  Oh my heart!  My heart is pounding in me; I cannot be silent, because you have heard, O my soul, the sound of the trumpet, the alarm of war...Therefore, thus says the Lord, the God of hosts, 'Because you have spoken this word, behold, I am making My words in your mouth fire and this people wood, and it will consume them.  Behold, I am bringing a nation against you from afar, O house of Israel,' declares the Lord.  'It is an enduring nation, it is an ancient nation, a nation whose language you do not know, nor can you understand what they say.  Their quiver is like an open grave, all of them are mighty men.  They will devour your harvest and your food; they will devour your sons and your daughters; they will devour your flocks and your herds; they will devour your vines and your fig trees; they will demolish with the sword your fortified cities in which you trust.'" (Jeremiah 4:1 & 5:14-17, NASB)