Based on the provided text, what is the nature of Sai Baba's existence after he attained Nirvana?

The text in Chapter 33 makes it clear that although Sai Baba attained Nirvana in 1918, his existence did not end. It poses the rhetorical question, "Being in a body means being alive; being in Samadhi means what - dead?" The answer provided is that Sai is beyond birth and death and remains steadfastly present for his devotees. The experience of Narayanrao, who was cured of a fatal illness by a dream vision of Baba a year after the Samadhi, serves as a prime example. The scripture explains that Baba responds to the call of exclusive love, and whoever sees him with love becomes his possession for life.