In Perek 3, we read about a man who was effected by the destruction in Yirushalayim. In the beginning he is very angry with Hashem. He is very angry about all the destruction and does not think it was fair. He feel that Hashem made him nothing and that He went out of the way to bring destruction. He suddenly changes his opinion. He starts to say that there is still hope and Hashem didn't really want to bring the destruction. He starts to ask Hashem for forgiveness. He also praises Hashem. What could make him have a sudden change of heart?