In the first parts of Khaled Hosseini's
A Thousand Splendid Suns, Mariam is portrayed as a broken wife who lived unhappily. In chapter 27, Mariam couldn't find it in her to inspire Laila to progress, because she couldn't move forward either. "The girl (Laila) was looking back at Mariam to pass on wisdom, to say something encouraging. But what wisdom did Mariam have to offer? What encouragement?" With the use of textual evidence, explain how Mariam's attitude and persona change from beginning to end.