Could you explain the metaphor of the snake and the rope as it is used in Chapter 22 to illustrate the Sadguru's power?

In Chapter 22, the Sadguru's power over illusion is explained through the metaphor of a rope being mistaken for a snake in dim light. The text states that the Guru is the creator of the "snake-like tendency" (the illusion) and also the one who gives it the "form of a rope" (the reality). This illustrates that the Guru is the source of both fear and its ultimate removal. The chapter goes on to say that before this illusion, in total darkness, there was neither snake nor rope, and this formless state is also the Guru. Therefore, as described in Chapter 22, the Sadguru is presented as the master of perception, creating illusion and also being the one who mercifully dispels it for devotees.