What philosophical principle did Sai Baba introduce to explain his seemingly unfair treatment of the two gentlemen from Goa regarding their monetary offerings?

When confronted by Shama about his seemingly partial behavior, Sai Baba introduced a profound philosophical concept rooted in karma and inescapable obligations. As explained in Chapter 36, Baba stated that he personally takes nothing, but that "Mother Masjid demands what is owed." This implies the transaction was not a simple offering but the settlement of a pre-existing debt. He then generalized this principle by stating, "But debt, enmity, and murder—these are not escaped by the doer even at the end of an eon." This powerful statement suggests that the acceptance of Rs. 15 and refusal of Rs. 35 were not arbitrary acts, but were governed by karmic laws of debt that persist across lifetimes.