Based on Chapter 7, what was Sai Baba's attitude towards the caste system and ideas of ritual purity?

Chapter 7 reveals that Sai Baba was completely beyond the distinctions of caste and concepts of ritual purity. The text explicitly states that for him, caste "did not matter even in the slightest degree" and that he was the same to all, whether Shudra or outcaste. This is proven by the fact that the "best of Brahmins" and even Agnihotris (keepers of sacred fire), who are very particular about ritual purity, would abandon their pride and prostrate before him. Furthermore, his transcendence of purity rules is shown by his lack of disgust, as the text notes his mind would feel nothing even if a dog were to put its mouth in the food.