Based on Chapter 20, how is Sai Baba's divine nature described, particularly his relationship with form and formlessness?

Chapter 20 presents a profound view of Sai Baba's nature. The text explicitly states that Sai is 'originally formless, but took form for the sake of his devotees.' It uses the metaphor of an actor, saying that Baba accepted the role of the actress 'Maya' and played his part masterfully. This suggests that the physical form of Sai Baba was a manifestation of the formless divine, adopted out of compassion for his followers. The chapter also refers to him as a 'Siddhashram' (abode of the perfected), whose mere sight could relieve the fatigue of worldly life and drive away the delusion of existence for those close to him, further emphasizing his transcendent and compassionate nature.