O LORD, you are my God; I will exalt you and praise your name, for in perfect faithfulness you have done marvelous things, things planned long ago. You have made the city a heap of rubble, the fortified town a ruin, the foreigners’ stronghold a city no more; it will never be rebuilt. Therefore strong peoples will honor you; cities of ruthless nations will revere you. You have been a refuge for the poor, a refuge for the needy in his distress, a shelter from the storm and a shade from the heat. For the breath of the ruthless is like a storm driving against a wall and like the heat of the desert. You silence the uproar of foreigners; as heat is reduced by the shadow of a cloud, so the song of the ruthless is stilled.

God told Jeremiah to write this, to show the Israelites how to praise him. even inthe mist of sorrow and destruction, God still wants to be praised just as much, he's still God.