Can you explain the concept of non-duality between a Guru and a disciple as presented in the source material?

The source material from Chapter 27 presents a profound view of the Guru-disciple relationship, rooted in the principle of non-duality. It asserts that "Guru and devotee are not different; both are unique parts of one whole." This means any attempt to separate them is futile and born of ego. The text dismisses the notion of physical separation as superficial, asking, "When there are not two at all, then where does separation come from?" It describes a perfect Guru and disciple as being so unified that one does not remain without the other. This non-dual worship, as Chapter 27 illustrates, is presented as the true form of the relationship, beyond a mere transaction.