According to the source material from Chapter 37, how is the concept of death and heaven explained?

Chapter 37 presents a philosophical definition of death and heaven. It explains that what people call 'death' is simply when something that came from the unmanifest returns to the unmanifest. The true 'nooses of death' are identified as unrighteousness, ignorance, anger, and hatred. To enter the heavenly world, one must overcome these. The chapter further clarifies that the true heaven is not a place of mere sensual enjoyment but is the Vairaj (the Cosmic Being) itself. As described in Chapter 37, this divine heavenly state is a condition free from disease, worry, sorrow, hunger, and the fear of death, where the soul can move about without fear.