What does it mean that Sai Baba is the 'Supreme Brahman' and how did that relate to his physical body?

To call Sai Baba the 'complete Supreme Brahman' is to identify him with the ultimate, formless, and all-pervading reality. As Chapter 43 explains, because of this divine nature, the physical world is an illusion to him, and he is devoid of bodily consciousness. His physical body was merely an 'adjunct,' a temporary vessel. The text notes it is improper to think his infinite essence could be contained within a physical form of 'three and a half cubits' or be defined by caste. He had no awareness of physical ailments that might arise from past karma because he was beyond such limitations. His eventual merging into the unmanifest was a demonstration that his true self is not the body but the formless consciousness that fills the entire universe.