How does Chapter 18 explain the Sadguru's role in helping a devotee overcome Maya and the illusion of duality?

Chapter 18 presents the Sadguru as the ultimate guide for transcending illusion (Maya) and the false perception of duality. The chapter begins by hailing the Guru as the "Ruler of Maya," who, through experience, shows the world to be an illusion. It celebrates the Guru as being "beyond duality" and free from blemish. The text further explains that when a seeker is fortunate enough to fall within the Guru's grace, the "false logic of 'mine' and 'thine'"—the very essence of dualistic thinking—finds no place. The Guru is the one who can point out the Unperceivable, making the ultimate truth accessible to the devotee and showing them the true path beyond worldly illusions.