What does Chapter 16 reveal about Sai Baba's nature as a Guru and his reason for taking a physical form?

Chapter 16 explains that the Sadguru's true nature is beyond worldly attributes; he is described as "Stainless (Niranjana), the Imperishable (Avyaya), the One beyond attributes (Gunatita), the King of Yogis." He is an ocean of Truth, Consciousness, and Bliss. According to this chapter, the primary reason He has taken a physical body is entirely altruistic: "for the sake of helping others, to uplift the poor and lowly." Furthermore, the text clarifies that He may don a "cloak of ignorance" not because He is ignorant, but as a teaching method to impart knowledge to the ignorant and provide sweet instruction without transgressing proper conduct, as detailed in the opening stanzas of Chapter 16.