How does the concept of Maya relate to the states of bondage and liberation, and what is the role of 'vikalpa' (doubt) in this dynamic?

Chapter 50 explains that Maya is the supreme, indescribable illusion of name and form, and the states of bondage and liberation are born from imagination, which is the "dwelling place of Maya." Maya's power is such that it is very difficult to cross over. The text highlights the critical role of 'vikalpa', or doubt, in perpetuating this illusion. It is stated that "Ignorance manifests from doubt," and when doubt enters knowledge, even a wise person can become prideful, as exemplified by the supreme knower Shuka who suffered loss due to it. This contamination is compared to a drop of fermented gruel ruining a large pot of milk. Thus, to achieve liberation, one must abandon Maya by resolve, which requires the removal of doubt, a feat that Chapter 50 insists cannot be accomplished without a Guru.