Can you explain the philosophical concepts about Sai Baba presented in the beginning of Chapter 12, such as his relationship with duality and his divine form?

The start of Chapter 12 presents deep philosophical ideas about Sai Baba. He is hailed as the embodiment of Truth, Consciousness, and Bliss and the source of joy who calms the waves of worldly existence. A key teaching mentioned here is that through the knowledge of non-duality, Sai removes the obsession with duality even from the dull-witted. His divine form is described metaphorically within this chapter, stating that just as the sky expands to fill all places, so is His form depicted. This is a vision that the text says only the virtuous and fortunate are able to experience, positioning him as an immutable and eternal one.