How did the Patil's experience with Sai Baba transform his perspective on suffering and lead to a profound sense of gratitude?

The Patil initially experienced what felt like a harsh punishment from Baba, described in Chapter 13 as the "punishment by the cane and the bursting of the heart." However, this ordeal led to the complete destruction of his disease and relief from sorrow. The Patil realized this seemingly harsh act was a profound favor, feeling as though he had been reborn. Overwhelmed with an ocean of joy upon seeing Baba's face, he acknowledged the "inconceivable and unfathomable" novelty of Sai's methods. This transformation led him to express immense gratitude, concluding that the only way to repay this favor was to place his head at Baba's feet in total surrender.