How does Chapter 20 describe Sai Baba's fundamental nature and his decision to take a physical form?

In Chapter 20, Sai Baba is described as being originally formless but having taken on a physical form for the benefit of his devotees. The text uses the metaphor of an actor, stating that Baba accepted the role of the actress 'Maya' to play his part in the world. He is presented as a 'Siddhashram' (abode of the perfected), whose mere sight relieves the fatigue of worldly life and dispels the delusion of existence for those close to him. The chapter's invocation praises him as the one who gives shelter and ends the cycle of rebirths for his surrendered devotees.