Based on Chapter 20, how is Sai Baba described in both his formless and manifest aspects?

Chapter 20 of the Sai Satcharitra presents a dual nature of Sai Baba. It begins by stating that Sai is "originally formless" but took on a physical form for the benefit of his devotees, comparing his manifest role to an actor playing a part. This chapter describes his physical presence as a "Siddhashram" (abode of the perfected), where the mere sight of him relieves the fatigue of worldly life. It then details his compassionate actions, like distributing Udi after the noon Aarti with "boundless love in his heart," showing how his formless essence manifested in tangible, loving acts for his followers.