What was Sai Baba's attitude toward caste and social purity?

Chapter 7 reveals that Sai Baba was completely transcendent of caste and concepts of ritual purity. The text emphasizes that for him, who had no ego regarding his body, all castes were the same and there was no distinction of birth. This is powerfully illustrated by the fact that the most revered Brahmins and proud Agnihotris (keepers of the sacred fire) would abandon their pride in ritual purity and prostrate before him. His detachment was so profound that his mind felt no disgust even if a dog were to put its mouth in the food. This demonstrates that he saw the divine in all beings, regardless of their social standing or any external notions of cleanliness.