How did Amir Shakkar's faith help him endure his stay in the Chavadi, despite the terrible conditions and Baba's strict instructions?

Amir Shakkar was suffering from rheumatism and Baba instructed him to stay in the Chavadi, a dilapidated and uncomfortable place. According to Chapter 22, Baba's firm words were that Amir should not weigh the external conditions, whether the place was subject to wind, rain, or dampness. Even though the place was full of hardships, Amir accepted Baba's word as the ultimate medicine and the company of Sai as the 'Great Prasad.' He stayed there happily for nine months, demonstrating certain internal faith. This faith was the reason everything went well for him, despite the externally contrary conditions.