Chapter 11 says that by holding the Guru's feet, "the Guru himself fluctuates as the Supreme Brahman." What does this advanced concept imply?

This profound statement from Chapter 11 delves into the dynamic and transformative nature of Guru-worship. The phrase suggests that the Guru's state as the Supreme Brahman is an experience that is actualized and perceived through the devotee's absolute surrender and devotion. It implies that the Guru's ultimate reality is revealed in response to the devotee's action of holding his feet with "total devotion." This "fluctuation" is not a sign of instability but rather a responsive manifestation of divinity, unlocked by the devotee's faith. As Chapter 11 suggests, this is one of the deep "wonders of Guru-worship" that a sincere practitioner is meant to experience directly, rather than just understand intellectually.