How does Chapter 20 explain Sai Baba's fundamental nature and his purpose for taking a physical form?

Chapter 20 of the Sai Satcharitra begins by describing Sai Baba as a "Siddhashram" (abode of the perfected), whose very sight relieves the fatigue of worldly life and ends the cycle of rebirths. The chapter explicitly states that Sai is "originally formless" but chose to take on a physical form for the sake of his devotees. It uses the metaphor of an actor, explaining that Baba accepted the role of "Maya" and played his part perfectly to interact with and guide his followers. This reveals his divine, formless essence and his compassionate decision to manifest in a tangible way for the benefit of humankind.