The Satcharitra mentions that striving for heaven might be misguided. What is Sai's teaching on the true nature of heaven and where can it be found?

According to the teachings in Chapter 37, striving for a conventional, celestial heaven is not the ultimate goal. The text questions the pursuit of a heavenly abode that is merely a place for sensual enjoyment and from which one falls after their merit is exhausted. Instead, it redefines heaven as a state of being that can be experienced here and now. True heaven is described as the Vairaj, or the Cosmic Being itself. It is a state free from mental grief, disease, worry, and the fear of death, where the soul moves fearlessly. This divine state is found not in a distant realm, but by realizing the divine principle that pervades all of existence.