Can you list and explain the analogies Sai Baba uses to describe how Ignorance covers Knowledge?

In Chapter 39, Sai Baba employs several vivid analogies to explain how Ignorance veils the ever-present Knowledge. He compares Ignorance to a membrane covering a fetus, dust covering a mirror, and ash covering a fire. He also uses the image of moss covering pure water. Another powerful metaphor is that of an eclipse, where Rahu and Ketu obstruct our vision of the sun or moon, which are themselves always shining. In all these examples, the underlying reality—the fetus, the mirror, the fire, the water, the sun—is always there in its pure state; it is only the temporary obstruction, Ignorance, that must be skillfully removed to perceive it.