Based on the opening of Chapter 16, why has the Sadguru taken a physical body, and what is his true nature?

The text of Chapter 16 describes the Sadguru's true nature as stainless (Niranjana), imperishable (Avyaya), and beyond attributes (Gunatita). He is hailed as the "King of Yogis" and an "ocean of Truth, Consciousness, and Bliss." Despite this transcendent nature, the chapter explicitly states that he has taken a physical body for a compassionate purpose: "for the sake of helping others, to uplift the poor and lowly." This highlights a central theme that the Guru, though desireless and complete in Himself, assumes a human form to guide and elevate humanity, imparting knowledge to the ignorant by donning a metaphorical "cloak of ignorance."