What underlying spiritual principle regarding charity and grace is Chapter 29 trying to convey through its narratives?

Chapter 29 delves into the complex nature of divine grace and a saint's charity, using Sai Baba's actions as a teaching. While it establishes Baba's immense generosity and his regular distribution of money, it strongly counters the idea that this was a transactional or predictable act. The chapter emphasizes that 'no one knew his mind' and that he did not give to everyone who asked. The core spiritual principle, as explained in Chapter 29, is that receiving a blessing, especially from the hand of a saint, is not an entitlement but a matter of karmic readiness and auspicious timing. It is a 'shell of fortune' obtained only by the truly fortunate. The stories of the Ramdasi family's varied experiences and the introduction of the girl Amani serve to illustrate this profound truth that a saint's grace is inscrutable and flows according to divine will, not human expectation.