What does Chapter 16 reveal about the Sadguru's method for imparting Brahma-jnana and liberating disciples from worldly existence?

Chapter 16 explains that the Sadguru, though an ocean of Truth, Consciousness, and Bliss, adopts a special method to teach. He dons the "cloak of ignorance" to impart knowledge to the ignorant, providing sweet instruction without transgressing the boundaries of proper conduct. The chapter states that the ultimate goal, union with Brahman (Sayujya), is attained through faithful service to the Guru. Furthermore, the Sadguru is depicted as wielding the "sharp blade of the sword of Knowledge," a sight so powerful that the "tree of worldly existence" (Bhav-vriksha) trembles in fear, signifying his ability to sever a devotee's worldly attachments.