According to Chapter 28, what is the fundamental nature of Sai and how does this relate to His role as a Sadguru?

According to the teachings in Chapter 28, Sai is not separate from anyone but dwells in all beings, from the highest divine entity, Brahma, to the smallest ant and insect. The text explains that He pervades all things everywhere. This all-pervading nature is linked to His role as a Sadguru because He is described as being complete in Shabda-Brahma (the divine word) and showing signs of the Para-Brahman (Supreme Being). Chapter 28 states that proficiency in these aspects is what gives Him the quality of a Sadguru, who possesses a unique compassion that goes beyond a physical parent by removing the very cycle of birth and death.