The text seems to emphasize the importance of a Guru. Why is a Guru considered so essential for removing ignorance?

Chapter 50 highlights that a Guru is indispensable because ignorance often manifests from doubt ('vikalpa'), and this doubt cannot be removed without a Guru's guidance. The text warns that when doubt infiltrates knowledge, even a wise individual can become prideful. It uses a powerful analogy: just as a single drop of fermented gruel can spoil a large pot of milk, doubt can ruin a person's wisdom. Therefore, as explained in Chapter 50, the first step is to understand and remove ignorance with a Guru's help. This purifies the mind, allowing infinite 'knowledge' to manifest and lead to non-dual Samadhi.