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

Chapter 7 clearly illustrates that Sai Baba was completely beyond distinctions of caste and conventional notions of ritual purity. The text states that for one like Baba who has no ego regarding the body, caste did not matter in the slightest degree. He treated all castes equally, with no distinction of birth. This is evidenced by the fact that the "best of Brahmins" and Agnihotris (keepers of the sacred fire), who were typically very strict about purity, would abandon their pride and prostrate before him. The chapter further notes that his mind felt no disgust even if a dog put its mouth into the food, demonstrating his complete detachment from worldly ideas of purity and impurity.