According to the teachings, what is the true nature of death and what are the things that bind a person to it?

Chapter 37 explains that what we call 'death' is simply the process of that which came into form from the unmanifest returning to the unmanifest state. It further identifies specific spiritual pitfalls as the 'nooses of death'. These are adharma (unrighteousness), ignorance, anger, and hatred. The text suggests that one who can cross these obstacles enters the heavenly world. Furthermore, the belief that the ultimate reality, Parabrahman, is separate from oneself is what subjects a soul to the eternal cycle of death and rebirth, known as Samsara.