What made Leah come out of the corner in The Bronze Bow?

In chapter 10 Daniel gets a message from Simon that his grandmother is dying. Reluctantly he leaves his home on the mountain to go to his grandmother's house. She is too sick to let him in, and Leah won't open the door. When he breaks the door open, she scuttles away against the wall and stays there. Night falls and neighbors bring broth and hot coals, but Leah stays huddled against the wall, although she watches Daniel "from behind the tangled hair." As Daniel tries to nurse his grandmother, he begins speaking to her quietly. When he begins to speak of the Bible stories his grandmother had told Daniel and Leah as children, Leah stirs in the corner. Then Daniel begins to recite Psalm 23, and Leah comes to his side. She places her fingers on his hands and then sits down beside him. The words of scripture seem to have drawn Leah to Daniel and made her less fearful and more willing to trust her brother. Daniel felt that "was a sign that even now the devils did not have complete dominion."