Based on Chapter 13, what does Sai Baba require from his devotees, and how is this illustrated by the Patil's actions?

Chapter 13 clearly states that what Sainath requires from his followers is not complex rituals or material wealth, but rather 'two hands, one head, stability, faith, and total surrender.' The most important element highlighted is gratitude. The story of the Patil serves as a perfect illustration of these principles. After being healed by Baba, the Patil's heart overflows with gratitude and devotion. He expresses his complete surrender by placing his head at Baba's feet, acknowledging he has no other way to repay the favor. His devotion doesn't end there; he establishes a new tradition, the 'Satya-Sai vow,' which involves reading Sai's stories with love, showing a continuous and active form of faith and gratitude.