According to the teachings in Chapter 37, what is the true nature of 'death' and how is it related to one's internal state?

Chapter 37 presents a philosophical view on death, suggesting it is a transition from the manifest back to the unmanifest state. More significantly, it defines the true obstacles, or "nooses of death," not as external forces but as internal conditions. As detailed in the chapter, these are Adharma (unrighteousness), ignorance, anger, and hatred. The text posits that a person who successfully crosses these internal barriers is the one who truly enters the heavenly world. The chapter further links the cycle of death and rebirth to the ignorant belief that one is separate from the divine Parabrahman, implying that overcoming death is an internal, spiritual achievement.