How does Chapter 30 describe Sai Baba's nature, particularly his transition from the formless to the manifest?

Chapter 30 of the Sri Sai Satcharita portrays Sai Baba as fundamentally formless, or 'Nirguni.' However, through the power and qualities of his devotees' deep devotion, he draws that formless essence into a form with attributes, becoming 'Saguni.' This chapter beautifully explains that Baba's manifestation is a compassionate response to the devotee's need for a tangible object of worship. He is hailed as the 'crest-jewel among saints,' for whom the task of uplifting devotees is an inescapable duty. This transition from the abstract to the perceivable is a core theme presented at the beginning of Chapter 30.