How did Sai Baba describe his true, all-pervading nature beyond his physical body?

In Chapter 3, Sai Baba explains that while his physical body is perishable, his true self is the imperishable Brahman. He describes himself as being filled everywhere in the form of the eightfold nature (Ashtadha-prakriti), which constitutes everything in the moving and unmoving world that has a name, form, or shape. He stated, "I alone am everywhere. I am filled in all ten directions." This teaching, which he related to the discourse in the Gita, emphasizes that there is no object different from the Self and that he is the essence within all things, indicated by the sacred syllable 'Om'.