According to Sapatnekar's story, what is the philosophical basis for Sai Baba's omniscience?

The story of Sapatnekar in Shri Sai Satcharitra, Chapter 48, provides a profound explanation for Sai Baba's omniscience. After Baba recounts Sapatnekar's life, the text clarifies that Baba's knowledge is absolute because he is the form of Brahman and the entire universe is his family. The narrative states that Baba has manifested as the universe itself, making the distinction of "mine" and "thine" non-existent for him. He is one with the Supreme Being, so the dualities of seer, seeing, and seen do not apply. This is why Sapatnekar's life was as clear to Baba as a "gooseberry in the palm of the hand," because for Sai, there is no separation between himself and the world.