How does Chapter 30 explain Sai Baba's nature, particularly his transition from the formless to a form with attributes?

Chapter 30 of the Sai Satcharitra beautifully explains Sai Baba's dual nature. It states that in the beginning, Sai resides as the formless, or 'Nirguni'. However, it is through the qualities of his devotees' deep devotion that he is drawn into a form with attributes, becoming 'Saguni'. This chapter portrays him as the "crest-jewel among saints" and an 'Acharya' (teacher) whose unavoidable task is to uplift his devotees. Described as 'Karuṇālaya', an abode of mercy, his very presence, or darshan, is said to dispel the devotees' fear of worldly existence, illustrating how devotion gives form to the formless.