What is the nature of the Sadguru and how does He guide devotees according to Chapter 18?

Chapter 18 portrays the Sadguru as the supreme Eternal one, the very Truth of Brahman, who is beyond the confines of duality and is without blemish. The text glorifies the Guru as the one who effortlessly reveals the Unperceivable, a reality that the Vedas and Shrutis debate endlessly. As detailed in Chapter 18, the Guru's method of guidance is highly personalized; He shows the true path to each individual according to their unique worthiness and capacity, doing so without creating intellectual conflict. Through the Guru's grace, the false distinctions of "mine" and "thine" dissolve, leading the devotee to a state of non-duality and self-realization.