How does Sai Baba continue to manifest for his followers after leaving his physical form?

According to Chapter 43, Sai Baba continues to make his presence known in a hidden form, which is perceptible based on a devotee's faith. He reveals himself through various means, including giving visions to some, providing experiences and examples to most, and performing miracles for many. The text clearly states, "He is hidden from the faithless; he is seen right there by the faithful devotees." This means the experience of his presence is directly tied to one's state of mind. He is described as having a hidden form in the Chavadi, the form of Brahman in the mosque, and the form of Samadhi in the tomb, signifying his eternal and unbroken residence for the devout to perceive.