Can you elaborate on the philosophical description of Sai Baba in Chapter 36, particularly the reference to him being the 'swan in the lake of the Supreme'?

Chapter 36 offers a deep philosophical description of Sai Baba, referring to him as the 'swan in the lake of the Supreme.' This metaphor signifies supreme spiritual attainment and purity. The text further explains that he is 'indifferent to the "I am He" (So-ham) attitude,' which means he has transcended the ego-consciousness that identifies the self with the ultimate reality. Instead, he 'delights in the service of those liberated in Brahman.' This portrayal suggests a state beyond simple non-dual realization, one where the liberated soul actively engages in compassionate service while remaining completely detached, embodying the highest form of spiritual truth and action.