Based on the Patil's story in Chapter 13, what does Sainath require from his devotees?

Chapter 13 illustrates through the Patil's experience what Sainath truly values from a devotee. After being healed, the Patil wonders how he can repay such a favor and concludes that he can only surrender completely by placing his head at Baba's feet. The narrative then explicitly states that 'Sainath needs nothing else' besides 'Two hands, one head, stability, faith, and total surrender.' Furthermore, the text emphasizes the importance of gratitude, noting that 'only that one gratitude should be there.' The Patil's subsequent devotion and the creation of the Satya-Sai vow exemplify this principle of complete surrender and heartfelt gratitude as the core requirements for receiving Sai's grace.