Can you explain the concept of Sai transitioning from 'Nirguni' to 'Saguni' as described in Chapter 30?

Chapter 30 poetically describes a profound theological concept regarding Sai Baba's manifestation. It states that in the beginning, Sai resides as the formless, or 'Nirguni'. This represents the absolute, unmanifested divine principle. However, the text explains that through the compelling qualities of his devotees' devotion, this formless essence is drawn into a form with attributes, or 'Saguni'. This transition signifies that the devotees' love and faith cause the abstract divine to take a tangible form, making Sai Baba, the crest-jewel among saints, accessible to them.