According to the author in Chapter 22, why is the true nature of the Sadguru ultimately unknowable?

In Chapter 22, the author expresses the profound difficulty in comprehending the Sadguru's true essence. The Guru is depicted as the formless source, the creator of illusion (the snake-like tendency), and also the one who dispels it (revealing the rope). This nature, which is devoid of being and non-being, is so complex that the text claims even the Vedas became silent and the celestial serpent Shesha could not grasp the full reality. The author humbly concludes this reflection by questioning his own ability to understand, stating, "Who am I to know it?", thus positioning the Guru's true form as being beyond human intellect and expression.