According to the provided text, what is the true nature of heaven, and how is it distinguished from a place of mere sensual enjoyment?

The Shri Sai Satcharitra, in Chapter 37, offers a unique perspective on heaven, defining it not as a physical location but as a state of being. It states that the Vairaj (the Cosmic Being) itself is the heavenly world, a cosmic self-form free from mental grief. This divine heavenly state is characterized by the complete absence of disease, worry, sorrow, hunger, thirst, and the fear of old age or death. It is a realm where the soul moves about fearlessly. The chapter critiques the pursuit of a heaven meant only for sensual enjoyment, questioning the value of a place attained through penance that lacks the remembrance of the Lord, where Govinda's name is not chanted.