Why does the book say it's not fit to compare Sai to the sun or the moon?

In Chapter 50, the author, Hemadpant, uses comparisons to the sun and moon to highlight Sai Baba's eternal and perfect nature. He explains that it is not fitting to compare Sai to the sun because the sun eventually sets, implying a temporary presence and a cycle of appearance and disappearance. Similarly, comparing him to the moon is inadequate because the moon wanes and loses its fullness. In contrast, the text asserts that "Sai is forever complete." These comparisons serve to elevate Sai beyond the transient and cyclical phenomena of the natural world, portraying him as a constant, unwavering, and eternally complete spiritual reality upon whom the great souls meditate. This establishes Sai's supreme and unchanging state.