Can you describe the strange dreams the Patil experienced in Chapter 13 and explain their ultimate effect?

In Chapter 13, the Patil experiences two very strange and distressing dreams that ultimately lead to his healing. In the first dream, a teacher violently beats a student with a cane just to make him memorize a verse. Immediately following this, he has a second, even stranger dream where a gentleman sits on his chest and uses a grinding stone to make a mortar of it, causing him immense agony. Though the text notes that people often consider dreams an illusion, in this case, the opposite was true. Upon waking, the Patil found that his disease had vanished completely, and he felt an unprecedented freshness. Chapter 13 explains that these terrifying dream experiences were the very cause of "the destruction of the disease and relief from sorrow for the Patil."