What are the main obstacles that prevent someone from achieving true knowledge, even if they are considered wise?

As detailed in Chapter 50, several obstacles can obscure true knowledge. A primary barrier is doubt ('vikalpa'), which can cause even a wise person to become prideful. Another significant obstacle is attachment to worldly life. The text states that a person whose mind is fixed on wealth, luxury, and is constantly thinking of their wife and sons, possesses a form of knowledge that is merely ignorance. Such a person, deluded by these attachments, does not know their own welfare. Finally, Chapter 50 concludes that as long as a person is without devotion, their knowledge remains covered by ignorance.