Can you explain the philosophical concept of 'Nirguni' becoming 'Saguni' as detailed in the opening verses of Chapter 30?

Chapter 30 introduces a profound spiritual concept regarding Sai Baba's manifestation. It states that initially, the divine resides in a formless, attributeless state known as 'Nirguni'. This is the unmanifest, absolute reality. However, the chapter explains that "through the qualities of devotees' devotion," this formless essence is drawn into a 'Saguni' form, which is a form with attributes. This implies that the intense love, faith, and devotion of the followers compel the abstract divine to take on a tangible, perceivable form like that of Sai Baba. This manifestation allows devotees to interact with, receive grace from, and have their worldly fears dispelled by the divine, who is described as the "crest-jewel among saints."