Considering Amir's rheumatism, why was he told to stay in a damp and windy place? What was the true nature of Baba's 'medicine'?

The treatment prescribed by Sai Baba was a profound test of faith rather than a conventional medical remedy. Chapter 22 explains that despite the contrary external conditions—dampness, wind, and cold, which would typically worsen rheumatism—the true medicine was obedience to Baba's word. The text explicitly states, 'Baba's medicine was only His word' and that Amir should not 'weigh' the conditions of the place. The cure stemmed from Amir's internal and certain faith, which allowed him to accept Baba's instruction as the ultimate 'Great Prasad' and stay there happily, leading to his eventual well-being.