Can you explain the metaphors of the 'sword of Knowledge' and the 'river of nectar' from Vedanta mentioned in Chapter 16?

In Chapter 16, these powerful metaphors describe key aspects of the Sadguru's spiritual power. His speech is likened to 'the river of nectar from the ocean of Vedanta,' signifying that his words are not ordinary but are filled with the profound, life-giving wisdom of the highest spiritual philosophy. Concurrently, the 'sharp blade of the sword of Knowledge' that he wields represents the power of divine wisdom to destroy ignorance and worldly attachment. The text notes that the mere sight of this sword makes the 'tree of worldly existence' tremble, illustrating knowledge's capacity to sever the roots of illusion.