How does Chapter 13 explore the relationship between dreams, illusion, and tangible reality through the Patil's experience?

Chapter 13 delves into the enigmatic nature of dreams and their connection to reality. The text explicitly challenges the notion that dreams are mere illusions, stating, 'People call dreams an illusion, but sometimes the opposite reality appears.' This is perfectly illustrated by the Patil's story. His terrible dream, involving being beaten and having his chest ground by a stone, was the direct cause of a tangible, real-world event: 'the destruction of the disease and relief from sorrow.' The narrative uses this to show that Sai Baba's grace operates in 'inconceivable and unfathomable' ways, turning a seemingly illusory punishment into a concrete and beneficial healing, thus blurring the lines between dream and reality.