What is the meaning of the "So-ham" attitude that Sai Baba was indifferent to, and what were his specific teachings on the subject?

Chapter 36 of the Shri Sai Satcharitra mentions that Sai Baba "is indifferent to the 'I am He' (So-ham) attitude." "So-ham" is a Sanskrit mantra that translates to "I am He" or "I am That," signifying the identification of the self with the ultimate reality or Brahman. The text notes his indifference to this attitude, suggesting a state beyond even this high spiritual realization, as he delights in service. However, these passages do not provide a detailed explanation of the philosophy or offer specific teachings or discourses from Sai Baba on this topic. It is mentioned as a characteristic of his divine nature, not a subject of instruction.