Baba told Annasaheb to worship Him, but then distinguished between His body and His true form. Can you explain what Baba described as His true, all-pervading nature?

In a profound discourse recorded in Chapter 3, Sai Baba explains his true nature beyond his physical form. After telling Annasaheb to perform his service, Baba clarifies that the "Sai's body is perishable; the Brahman is imperishable and worthy of worship." He reveals that He is omnipresent, pervading everything in the form of the eightfold nature (Ashtadha-prakriti). He states, "Whatever has name, form, or shape, in the world of the moving and unmoving, I alone am playing." Baba identifies Himself as the one indicated by Om (Pranav) and declares that He is filled within all objects in the universe and in all ten directions, leaving no object different from the Self. This teaching points to His identity as the ultimate, formless reality.