Chapter 13 describes the Patil having strange dreams. What happened in these dreams and what was their ultimate effect?

In Chapter 13, the ailing Patil experienced two consecutive dreams that were quite violent. In the first, a teacher beat him with a cane to make him memorize a verse. In the second, a gentleman sat on his chest and used a grinding stone on it, causing agony so intense it felt like death. While the narrative acknowledges that people often call dreams an illusion, it states that in this case, "the opposite reality appears." The ultimate effect was miraculous; upon waking, the Patil felt an unprecedented freshness, and his disease had vanished completely. The suffering in the dream was the very instrument of his healing.