Based on the Patil's story in Chapter 13, what are the essential qualities Sainath requires from his devotees?

The Patil's experience in Chapter 13 reveals the core requirements for a devotee of Sainath. After his miraculous cure, the Patil is overwhelmed with gratitude and devotion. The text explicitly summarizes what is needed: 'Two hands, one head, stability, faith, and total surrender. Sainath needs nothing else; only that one gratitude should be there.' This indicates that material possessions are unimportant compared to the devotee's inner state. The most crucial elements are unwavering faith, the act of complete surrender symbolized by placing one's head at the master's feet, and a heart overflowing with gratitude for the grace received, no matter how strangely it is delivered.