Can you explain the strange dreams the Patil had in Chapter 13 and how they led to his healing?

In Chapter 13, a Patil suffering from a disease experienced two very strange dreams that were actually interventions by Sai Baba. In the first dream, a teacher beat him with a cane, trying to make him memorize a verse. In the second, even stranger dream, a gentleman sat on his chest and used a grinding stone on him, causing agony. However, when the Patil woke up, he felt an 'unprecedented freshness,' and his disease had vanished completely. He realized that the apparent punishment in his dreams was a mysterious and beneficial act of grace from Baba that resulted in his complete healing and a feeling of being reborn.