How does Chapter 12 explain the Guru's role in helping a person understand non-duality?

In Chapter 12, the Guru, represented by Sadguru Sainath, is described as the embodiment of Truth, Consciousness, and Bliss. His primary role in this context is to still the "waves of worldly existence" for the devotee. The chapter explains that through the knowledge of non-duality, the Guru removes the "obsession with duality," a service he can provide even to the dull-witted. The Guru's form is likened to the expansive sky that fills all places, a perception available to the virtuous and fortunate. By encouraging firm faith over the pride of dry knowledge, the Guru guides the devotee away from a dualistic worldview and toward the realization of the non-dual Supreme Soul.