Based on the text, what are the circumstances under which Sai Baba grants grace and fulfills a devotee's purpose?

Chapter 27 reveals that Sai Baba's grace is not granted based on a rigid set of rules but is wonderfully surprising and personal. The text states that the method of grace is determined by the devotee's unique situation, considering their mental disposition, level of service, and the intensity of their love. It's highlighted that Baba's acts are surprising and he might become pleased and grant grace when it's least expected. He would often fulfill a devotee's purpose through seemingly casual means, like joking and humor, when the desire simply arose in his mind. This indicates that his blessings were a spontaneous outflow of his divine nature, tailored to each individual's needs and spiritual readiness.