How does Chapter 27 explain the esoteric nature of Guru's grace and the conditions for its attainment?

Chapter 27 presents the Guru's grace as a profound internal awakening that is beyond ordinary perception. It states that this grace cannot be shown to the eyes and is beyond the reach of all senses. The manifestation of this grace is the destruction of conflicts and the emergence of supreme love. The text emphasizes that a Sadguru is the only giver of this grace, and one cannot be found even by searching the three worlds. Attainment is conditional upon having ultimate faith in the Guru's feet, which allows for the subsiding of the six passions and the rise of the eight sattvic emotions. The Guru, in turn, feels joy as the devotee progresses spiritually.