How does Chapter 30 explain Sai Baba's transition from being formless to having a physical form?

Chapter 30 of the Sai Satcharita beautifully explains this concept by stating that in the beginning, Sai resides as the formless, or 'Nirguni'. However, it is through the powerful qualities of devotees' devotion that He is drawn from the formless into a form with attributes, known as 'Saguni'. The text refers to Him as the 'crest-jewel among saints' who manifests in a perceivable form in response to the love and faith of His followers, as described in the poetic verses of this chapter.