How did Sai Baba's behavior show his disregard for caste distinctions and ritual purity?

Chapter 7 provides clear examples of how Sai Baba transcended social norms regarding caste and ritual purity. The text states that for one who has no ego regarding the body, like Baba, caste did not matter in the slightest. This is illustrated by the fact that the most respected Brahmins and even Agnihotris, who were keepers of sacred fires, would abandon their pride in ritual purity and prostrate before him. Furthermore, the chapter notes his complete lack of disgust or revulsion, mentioning that his mind was unaffected even if a dog happened to put its mouth into the food being served to the Fakirs.