How does the story of the Patil in Chapter 13 challenge the common idea that dreams are merely illusions?

Chapter 13 directly confronts the notion of dreams as simple illusions through the Patil's experience. The text explicitly states, "People call dreams an illusion, but sometimes the opposite reality appears." In the Patil's case, the dream world had a direct and tangible impact on his physical reality. The agony of being beaten by a cane and crushed by a mortar stone in his dreams led to the very real outcome of his disease being completely cured upon waking. The story posits that, through the power of a saint's grace, dreams can become a potent vehicle for real-world events, including miraculous physical healing. The absence of any physical marks from the dream's violence further highlights the spiritual, rather than illusory, nature of the event.