Describe the complete transformation in the Patil's state of being as narrated in Chapter 13, from his illness to his profound devotion.

The Patil's transformation in Chapter 13 is profound. He begins in a state of suffering due to a disease, which is mirrored by the agony he experiences in his dreams. Upon waking, his reality is completely inverted: the disease vanishes, and he feels an 'unprecedented freshness,' as if he has been reborn. This miraculous cure sparks a deep sense of gratitude. When he goes for Baba's darshan, his joy becomes an overflowing ocean, and he expresses his complete surrender by placing his forehead on Baba's feet. This transformation is solidified as he channels his devotion into starting the 'Satya-Sai vow,' a regular practice of reading Sai's stories, demonstrating a lasting change from a state of physical and mental sorrow to one of sustained spiritual joy and faith.