In Chapter 50, why is Sai Baba considered superior to both the sun and the moon?

In Chapter 50, the author Hemadpant uses a comparison to the sun and moon to highlight Sai Baba's eternal and perfect nature. He states that it is not fitting to compare Sai to the sun, because the sun eventually sets, plunging the world into darkness. Similarly, a comparison to the moon is also inadequate because the moon wanes and is not always full. In contrast, the chapter explains that 'Sai is forever complete.' This metaphor powerfully conveys the idea that Sai Baba's presence, grace, and spiritual light are constant, unwavering, and eternal, unlike the celestial bodies which are subject to cycles and temporary absences. This establishes Sai as a perpetual source of consciousness.