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

Chapter 20 presents a profound view of Sai Baba's nature. It states that Sai is 'originally formless' but chose to take on a physical form specifically for the benefit of his devotees. The text uses the metaphor of an actor, saying he accepted the role of 'Maya' and played his part perfectly. Furthermore, he is described as a 'Siddhashram' (abode of the perfected), whose very presence relieves worldly fatigue and dispels delusion. His purpose is to provide a refuge that ultimately ends the cycle of rebirth for those who surrender to him.