Chapter 30 mentions Sai moving from 'Nirguni' to 'Saguni.' Can you explain what this means based on the text?

According to Chapter 30 of the Sai Satcharitra, Sai Baba initially resides in a formless, attributeless state, referred to as 'Nirguni.' However, it is the power and quality of his devotees' deep devotion that draws this formless essence into a tangible form with attributes, which is known as 'Saguni.' This transition highlights a profound spiritual concept: the formless Divine manifests in a perceivable form for the sake of the devotees, making it easier for them to connect with and worship Him. The text explicitly states, 'In the beginning, You reside as the formless (Nirguni). Then, through the qualities of devotees' devotion, You draw the formless into form with attributes (Saguni).'