Using the metaphors found in Chapter 18, explain the Guru's role and the impact of his grace.

Chapter 18 employs several potent metaphors to illustrate the Guru's divine role. The Guru is likened to 'the rain clouds of the monsoon,' which impartially shower the 'water of self-bliss' with love, signifying that the Guru's grace and teachings are available to all, according to their worthiness. The most striking metaphor compares a devotee to a 'doll made of salt' that enters the ocean; it dissolves and becomes one with the sea, never to return in its original form. As detailed in Chapter 18, this powerfully conveys the irreversible and transformative nature of surrendering to the Guru, where the individual ego dissolves into the vastness of divine consciousness, and the false logic of 'mine' and 'thine' ceases to exist.