According to the introductory verses, what are the supreme qualities attributed to the Sadguru in Chapter 18?

The opening salutations of Chapter 18 attribute several supreme qualities to the Sadguru, portraying him as a divine and absolute entity. He is hailed as the "supreme Eternal one" and the very embodiment of the "Truth of Brahman." The text celebrates the Guru as the "Ruler of Maya," who has the power to reveal the illusory nature of the world through direct experience. Furthermore, the Sadguru is described as being "Beginningless and Endless," existing "beyond duality," and being entirely "without blemish." Chapter 18 posits that the Guru alone is the true teacher of the knowledge of the Self, guiding seekers to ultimate union.