How do Sai's teachings define 'heaven' and is it presented as a desirable goal for devotees?

According to Chapter 37, the teachings question the pursuit of a traditional heaven, which is depicted as merely a place for sensual enjoyment. The text argues that there is no real difference in the quality of sensual pleasure, whether experienced by Indra in heaven or a donkey on earth. Instead of this, true 'heaven' is defined as a state of being—the Vairaj or Cosmic Self-form, which is free from mental grief, disease, worry, and the fear of death. The text suggests the earth-world is more important, as a life of any length dedicated to God can lead to fearlessness, a state superior to a temporary stay in a heaven from which one eventually falls after their merit is exhausted.