What was the principle behind Sai Baba's prescribed 'medicine' for Amir Shakkar's rheumatism?

As detailed in Chapter 22, the treatment for Amir's rheumatism was not a physical remedy but a test of faith. Baba's medicine was simply His word: that Amir must stay in the Chavadi. The principle was that accepting Baba's command as the ultimate remedy, despite the physically adverse conditions of dampness and cold that would normally worsen rheumatism, was the actual cure. The text states, 'Accepting His word as medicine, he stayed there happily' and 'internally there was certain faith; because of that, everything went well,' emphasizing that the healing process was rooted in unwavering trust.