How does Sai Baba use analogies to illustrate that Knowledge is ever-present but obscured?

In Chapter 39, Sai Baba employs several powerful analogies to explain how self-existent Knowledge is veiled by Ignorance. He compares this dynamic to a membrane covering a fetus, dust covering a mirror, ash covering a fire, and moss obscuring pure water beneath it. He also uses the example of a solar or lunar eclipse, pointing out that the sun and moon are always shining, but our vision is temporarily obstructed by Rahu and Ketu. Similarly, Knowledge is always unobstructed in its own place; it is merely our perception that is blocked by the film of Ignorance, which must be skillfully removed.