How did Sai Baba's behavior demonstrate his indifference to caste and concepts of ritual purity?

Chapter 7 illustrates Sai Baba's complete transcendence of caste and purity rules. It states that for one surrendered to God, caste did not matter in the slightest, and He treated all castes equally. Even the 'best of Brahmins' and Agnihotris (keepers of sacred fire) would abandon their pride in ritual purity and prostrate before Him. The text further highlights His lack of ego regarding the body by noting that He felt no disgust even if a dog put its mouth into the food. This behavior, as described in Chapter 7, amazed people and showed that He was beyond all social distinctions and conventional norms of purity.