How does Chapter 20 describe Sai Baba's fundamental nature and the impact he has on his devotees?

Chapter 20 presents a profound description of Sai Baba's nature. It states that Sai is originally formless but took on a physical form for the sake of his devotees, playing the role like an actor. His presence is described as a "Siddhashram," or an abode of the perfected, where the mere sight of him relieves the fatigue of worldly life. For those close to him, his constant presence is said to drive away the delusion of existence. The chapter begins by comparing the Guru to the Manasa lake, whose words of grace are like pearls for his devotees.