How does Chapter 18 describe the effect of a Sadguru's grace on a devotee's perception of the world?

According to the insights in Chapter 18, the Sadguru's grace has a transformative effect on a devotee's perception. The text explains that through the Guru's grace, one can see the world as an illusion, as he is the "Ruler of Maya." More specifically, the chapter states that if one is fortunate enough to receive this grace, "the false logic of 'mine' and 'thine' (this one is ours, that one is a stranger) finds no place." This indicates that the Guru's grace dismantles dualistic thinking and removes the veil of separation, leading the devotee to a more unified and enlightened perspective.