What was Sai Baba's attitude towards the caste system and ritual purity?

Sai Baba completely transcended caste distinctions and notions of ritual purity. Chapter 7 explains that for someone like him, who has no ego regarding the body, caste did not matter in the slightest. He treated all castes, whether Shudra or outcaste, equally. The proof of his influence was that the 'best of Brahmins' and even Agnihotris (keepers of the sacred fire), who were typically strict about ritual purity, would abandon their pride and prostrate before him. His disregard for such norms is further illustrated by the fact that his mind felt no disgust even if a dog were to put its mouth into the food being served.