What was Sai Baba's surprising advice to Das Ganu when he approached him with a doubt about the scriptures?

When Das Ganu was struggling to understand the deep meaning of the Ishavasya Upanishad for his commentary, he traveled to Shirdi to seek help from his Satguru. As Chapter 20 recounts, Baba's response was quite unexpected. Instead of providing a direct explanation of the scripture, Sai Baba told him, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house When you return there." This instruction is highlighted as the central thread of the story, setting up the narrative of how Baba would use a seemingly ordinary person, a maidservant, to reveal profound spiritual truths.