What is the spiritual lesson behind the story of Kashiram's financial ruin and subsequent recovery?

The spiritual lesson from Kashiram's financial struggles is about the dissolution of ego and pride. As described in Chapter 0, Kashiram developed a subtle pride in being a donor, feeling that he had the 'power to give' Dakshina to Maharaj. This feeling is an obstacle to spiritual advancement. To purify his devotee, Maharaj orchestrated a Leela where he demanded increasing amounts of Dakshina until Kashiram's funds were depleted and he had to borrow. The whole purpose of this was to make Kashiram confront his own powerlessness. The moment he was fully convinced that he did not have the power to give, and that God is the only true source, his pride vanished. Immediately following this realization, his financial condition began to improve, demonstrating that true prosperity follows humility and the removal of ego.