Why does the author in Chapter 50 argue that Sai cannot be adequately compared to the sun or the moon?

In Chapter 50, the author Hemadpant attempts to describe the eternal and perfect nature of Sai Baba and concludes that conventional comparisons fall short. He states that it is not fitting to compare Sai to the sun, because the sun eventually sets, implying a period of absence or darkness. Similarly, a comparison to the moon is also dismissed because the moon wanes and is not always full. Chapter 50 emphasizes that "Sai is forever complete." This highlights Sai's constant, unwavering, and perfect presence, which transcends the cyclical and impermanent nature of celestial bodies, making Him an eternal source of light and guidance for devotees.