How is the Sadguru's divine nature described in the opening verses of Chapter 22?

The opening verses of Chapter 22 describe the Sadguru's divine nature in profound, philosophical terms. He is hailed as the "embodiment of bliss," the "supreme purifier," and the "destroyer of the fear of worldly existence." The chapter refers to Him as an "ocean of bliss" from which the waves of mental tendencies arise, which He alone can restrain. His nature is presented as a paradox; He is the formless reality that existed before illusion ("when there was total darkness"), yet He is also the very "cause of that illusion." This divine essence is portrayed as being so vast and incomprehensible that, as Chapter 22 states, the Vedas "became silent" and even the celestial serpent Shesha could not know His true reality.