According to Chapter 13, what does Sainath truly require from his devotees, as exemplified by the Patil's actions after his healing?

Chapter 13 makes it very clear what Sainath values most in his devotees, using the Patil's transformation as the prime example. After being miraculously cured through what seemed like a punishing dream, the Patil's heart overflows with gratitude. The text explicitly states, 'Two hands, one head, stability, faith, and total surrender. Sainath needs nothing else; only that one gratitude should be there.' The Patil embodies this by first surrendering completely at Baba's feet, acknowledging he can never truly repay the favor. He then channels this faith and gratitude into a dedicated practice, creating the 'Satya-Sai' vow, demonstrating that true faith is a continuous expression of gratitude and surrender.