How did Sai Baba demonstrate his complete indifference to caste distinctions and concepts of ritual purity?

As detailed in Chapter 7, Sai Baba was entirely beyond caste considerations. It is noted that the 'best of Brahmins' and even Agnihotris (keepers of the sacred fire) would abandon their pride in ritual purity and prostrate themselves before him. The text emphasizes that caste did not matter in the slightest degree to him, whether one was a Shudra or an outcaste. His detachment from worldly norms was so profound that if a dog were to put its mouth into the food, his mind felt no disgust, showcasing his lack of ego regarding the body and his equal vision for all beings.