What was Sai Baba's unusual instruction to Das Ganu for resolving his doubt about the Upanishad?

When Das Ganu approached Sai Baba in Shirdi regarding his profound doubt about the Ishavasya Upanishad, Baba's guidance was highly unconventional. As narrated in Chapter 20, instead of providing a direct philosophical discourse or explanation, Sai Baba simply told him, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house When you return there." This surprising instruction highlights Baba's unique teaching method, which often involved revealing deep spiritual truths through ordinary people and everyday situations, rather than through complex scriptural analysis.