Chapter 20 mentions that Baba would explain a scripture's meaning through a maidservant. What was the context of this story involving Das Ganu?

The central narrative of Chapter 20 revolves around Das Ganu's attempt to write a Marathi commentary on the Ishavasya Upanishad. He found himself unable to comprehend the deep, internal meaning of the scripture, which left him dissatisfied. As recounted in this chapter, he traveled to Shirdi to seek clarification from his Satguru, Sai Baba. In a surprising turn, Baba did not provide a direct explanation. Instead, he prophesied that Das Ganu's doubt would be resolved by a maidservant at Kaka's house upon his return, setting the stage for a profound lesson on how spiritual wisdom can be imparted through unexpected channels by a Guru's grace.