What philosophical concepts about the Sadguru are introduced at the beginning of Chapter 18?

The beginning of Chapter 18 introduces several profound philosophical concepts about the Sadguru. He is hailed as the 'Beginningless and Endless' and 'beyond duality,' signifying his eternal and non-dual nature. The text declares, 'Through experience, You show the world to be an illusion,' positioning the Guru as the 'Ruler of Maya' who helps devotees see beyond worldly falsehoods. Furthermore, it is stated that if one is fortunate enough to receive the Guru's grace, the false logic of 'mine' and 'thine' disappears, leading to a state of unity. This chapter establishes the Guru as the ultimate teacher of Self-knowledge.