What was Sai Baba's specific instruction to Amir Shakkar regarding the hardships of the Chavadi, and how did it function as 'medicine'?

When Amir Shakkar was suffering from the damp, cold, and generally miserable conditions of the Chavadi, Sai Baba's remedy was not physical but spiritual. Chapter 22 states that Baba's "medicine was only His word." Baba gave him a firm command: "Wind, rain, or dampness, whether the place is high, low, or deep—do not weigh them." This instruction acted as medicine by shifting Amir's focus from his physical discomfort to the act of surrender and obedience. By accepting Baba's word and valuing the company of Sai above all else, he was able to endure the external difficulties with internal faith and happiness for nine months.