How did Sai Baba's prescribed remedy for Amir Shakkar's rheumatism work, despite the terrible living conditions?

Sai Baba's remedy for Amir Shakkar's rheumatism was a profound test of faith rather than a conventional treatment. As detailed in Chapter 22, Baba instructed Amir, who was afflicted by rheumatism, to stay in the Chavadi. This place was old, dilapidated, damp, and filled with garbage and scorpions—conditions entirely contrary to healing. However, Baba's firm words were the true medicine; he told Amir not to be concerned by the wind, rain, or dampness. Amir accepted Baba's word as the "Great Prasad" and stayed for nine months. The text highlights that while "externally, all conditions were contrary," Amir maintained "certain faith" internally, and because of this faith, "everything went well."