How does Chapter 37 redefine the concepts of heaven and death, moving away from conventional interpretations?

According to the excerpts from Chapter 37, the conventional understanding of death and heaven is challenged. Death is described not as an end but as a transition where the 'manifest' state returns to the 'unmanifest.' The text posits that the cycle of birth and death continues for those who maintain a sense of difference from Parabrahman. Furthermore, Chapter 37 presents heaven not as a celestial abode for sensual enjoyment, but as the 'Vairaj' or the Cosmic Self-form. This true heavenly state is characterized by freedom from disease, worry, sorrow, hunger, and the fear of death, where the soul moves fearlessly. The chapter explicitly states that a heaven gained through rituals but lacking the remembrance of Lord Narayana is undesirable.