What was the nature of Sai Baba's 'medicine' for Amir Shakkar's rheumatism, and why was it effective despite the poor conditions of the Chavadi?

Sai Baba's treatment for Amir Shakkar's rheumatism was not a physical substance but a spiritual prescription based on faith and obedience. Chapter 22 states that Baba's medicine was simply His word. He instructed Amir to stay in the damp, cold, and dilapidated Chavadi and to disregard the hostile environment. The effectiveness of this 'cure' lay in Amir's internal state. Despite the external conditions being completely contrary to what would normally be recommended for rheumatism, Amir possessed a certain and unwavering faith. He accepted Baba's word as medicine and the company of Sai as the 'Great Prasad.' This internal faith, as the scripture suggests, was the reason everything went well and healing occurred.