According to the text, on what basis does Sai Baba decide how to grant his grace to a devotee?

Sai Baba's granting of grace is a deeply personal and tailored process, not a one-size-fits-all rule. Chapter 27 explains that the specific method of grace is determined by several factors unique to the individual. These include the devotee's level of authority or capacity, their mental disposition, the service they have rendered, and the depth of their love and devotion. Baba's actions are described as wonderful and surprising; his grace could be granted when least expected, often through casual joking and humor, to fulfill a devotee's purpose. This individualized approach is compared to a doctor who diagnoses a patient and chooses the right medicine and method of delivery for them.