According to Chapter 48, how does a Sadguru's relationship with a disciple differ from that of a mere teacher?

Chapter 48 of the Sai Satcharitra draws a profound distinction in the master-disciple relationship. Unlike a mere teacher, a true Sadguru is described as being completely free from the ego of their position. The chapter states that a Sadguru is one who "never even dreams of receiving service from a disciple, but instead wishes to sacrifice his own body for the sake of the disciple." This selfless attitude is paramount. A Sadguru views the disciple as a form of the Supreme Brahman and holds a "fatherly love for him," never desiring to use the disciple for their own livelihood. This contrasts sharply with teachers who might focus on intellectual instruction without this deep, selfless, and spiritual connection.