How can Baba still be present in Shirdi and for his devotees if he left his body?

Even though Baba left his physical body, Chapter 43 explains that he is eternally present because he became one with Brahman and, in his true form, fills the entire moving and non-moving world. The text draws a parallel, stating that just as saints like Gyaneshwar and Tukaram remain accessible, Sai is the same in Shirdi. He is described as having merged into the unmanifest, where he enjoys his true self and 'always keeps the devotees awake.' His presence is a living reality, proven by the fact that devotees can still have experiences of him today, based on the sincerity and feeling in their own minds.