Chapter 16 is titled 'The Quest for Brahma-jnana.' How do the teachings within this chapter guide a seeker toward this ultimate knowledge?

Chapter 16 outlines a clear path for attaining Brahma-jnana, or knowledge of the Absolute. It posits that the most effective means is through devoted service to the Guru. The text states that by serving Him with faith, the servant attains union with Brahman (Sayujya), and all other methods will fail. The Guru is described as the one who gives the "Unthinkable Object" (Brahman) to His devotee. This process requires the disciple to abandon cleverness and remain humble, fully surrendering to the Guru who wields the 'sword of Knowledge' capable of felling the 'tree of worldly existence.'