Based on Chapter 13, how did the Patil's traumatic dreams lead to a strengthening of his faith?

In Chapter 13, a Patil suffering from a disease experienced two strange and agonizing dreams. In the first, a teacher beat him with a cane to make him memorize a verse. In the second, someone pressed a grinding stone on his chest. Despite the torment, he woke up to find his disease had vanished completely, feeling an unprecedented freshness. The text notes that while dreams are often illusions, this one brought about a real destruction of his disease. Realizing this was Sai Baba's unconventional grace, the Patil felt as if he had been reborn and went for darshan, his heart overflowing with joy and gratitude. The punishment he endured in the dream resulted in a clearly beneficial outcome, profoundly deepening his faith in Baba's inconceivable ways.