According to the teachings in Chapter 22, why is the true nature of the Sadguru considered beyond human comprehension?

Chapter 22 delves into the profound and unknowable nature of the Sadguru. It posits that before creation, when there was only darkness, the Sadguru existed in a formless state. He is described as the origin of illusion and also the revealer of truth, a nature devoid of simple being and non-being. This complex duality is so profound that the chapter states, "the Vedas became silent" and even the celestial serpent Shesha, despite having countless mouths, could not grasp the Sadguru's true reality. This illustrates that his ultimate form is beyond the grasp of intellectual or scriptural understanding.