Based on Chapter 50, how is Sai Baba's nature described, and why is he considered superior to the sun and moon?

In Chapter 50, Sai Baba is depicted as the embodiment of pure consciousness, the Unmanifest taking a physical form for the sake of his devotees. He is described as desireless, compassionate, and possessing the power to crush a devotee's ego with the touch of his hand. The author, Hemadpant, finds celestial comparisons inadequate for Sai. He notes that it's unfit to compare Sai to the sun, because the sun eventually sets. Likewise, a comparison to the moon is flawed because the moon wanes. In contrast, Chapter 50 states that 'Sai is forever complete,' highlighting his eternal and unchanging divine nature which transcends these natural phenomena.