What is the root cause of the cycle of birth and death, and what are the obstacles to liberation?

Chapter 37 reveals that the perpetual cycle of worldly existence, or Samsara, is driven by a fundamental ignorance. The belief that "Parabrahman is different from me; I am not that" is what subjects a soul to death and rebirth. The primary obstacles, described as the 'nooses of death', are adharma (unrighteousness), ignorance, anger, and hatred. The text suggests that only by entirely crossing these negative qualities can one enter the true heavenly state of liberation and break free from the cycle.