What spiritual qualities and tools are associated with the Guru in his quest for Brahma-jnana as described in Chapter 16?

Chapter 16 of the Sai Satcharitra describes the Guru as being endowed with profound spiritual qualities and tools. His state is one of "natural non-duality and devotion." His ornaments are not material but are the divine gems of Peace and Self-control shining around his neck. His speech is described as the "river of nectar from the ocean of Vedanta." One of his most powerful tools is the "sharp blade of the sword of Knowledge," which is so potent that the mere sight of his hand raised to strike with it causes the tree of worldly existence to tremble in fear. These descriptions from Chapter 16 emphasize the Guru's complete mastery over the self and his role in cutting through illusion.