How does the exchange over Damu Anna's letter illustrate Sai Baba's omniscience?

The incident with Damu Anna's letter, described in Chapter 25, provides a compelling illustration of Sai Baba's omniscience. Before the letter was even read, Baba asked, "What does he write? What plans is he making?" and then remarked, "It seems he is trying to touch the sky! He doesn't want what God gives." Shama immediately confirmed this, stating, "Whatever You are speaking, That is the exact meaning of the letter; these are Damu Anna's words literally." This demonstrates that Baba knew the inner intent and content of the letter without needing it to be read. Shama's subsequent reflection that Baba stirs commotion in devotees' minds only to draw them closer further highlights this divine play and foresight, even as Baba humbly claims, "I just speak whatever comes to my mind."