What does Chapter 16 reveal about the purpose of the Guru's incarnation and his methods for imparting knowledge?

Chapter 16 explains that the Guru, the King of Yogis, has taken a physical body for the altruistic purpose of helping others and uplifting the poor and lowly. His teaching methods are described through powerful metaphors. He wields the "sharp blade of the sword of Knowledge," which causes the "tree of worldly existence" to tremble, signifying his power to cut through illusion. Furthermore, Chapter 16 notes a subtler method: the Guru sometimes dons a "cloak of ignorance" to impart knowledge to the ignorant, meeting them at their level and giving sweet instruction without transgressing the boundaries of proper conduct.