What are the primary obstacles that hide or corrupt knowledge, even for those who are considered wise?

As detailed in Chapter 50, knowledge can be obscured by ignorance just as a clean mirror is covered by dust or a fire's light is hidden by smoke. The text specifically identifies lust and anger as powerful forces that overcome and conceal knowledge. It explains that Maya, the illusory power, can cover self-luminous knowledge in the way moss covers water or an eclipse darkens the moon. This is so potent that even the intellect of great knowers can become corrupted, leading to their downfall. They may know the right remedies but fail to apply them, ultimately behaving according to their whims and falling into ruin.