Based on the praises in Chapter 18, what are the key attributes and functions of the Sadguru?

Chapter 18 presents a comprehensive and exalted view of the Sadguru's attributes. The Sadguru is hailed as the 'supreme Eternal one' and the 'Ruler of Maya,' who shows the world to be an illusion through experience. As described in this chapter, the Guru is beginningless, endless, and beyond duality, serving as the sole 'teacher of the knowledge of the Self.' Furthermore, the Sadguru is compared to rain clouds that shower the water of self-bliss with love, and their grace eliminates the false logic of 'mine' and 'thine,' fostering a sense of unity among devotees.