What is the fundamental principle of oneness that Baba teaches, and how does it relate to the universe and the individual?

The core philosophical principle Baba teaches, as detailed in Chapter 14, is that the Essence within one's own body is identical to the Essence that permeates the entire universe. This means there is no fundamental separation between an individual and the cosmos. The text states that from the highest being like Brahma down to a simple blade of grass, everything is pervaded by Brahman. By surrendering the body and observing this uninterruptedly, one comes to know this profound oneness. He who internalizes this truth sees the same single essence in all beings and things.