Why does the text suggest the earth-world is more valuable than heaven for spiritual seekers?

The text in Chapter 37 argues that the earth-world holds more profound importance than heaven. It explains that heavenly pleasures are temporary, and one is destined to fall from heaven once their accumulated merit is exhausted. In contrast, the earth-world is the specific place where one can pursue and achieve ultimate liberation through the "science of the oneness of Brahman and the Self." The text emphasizes that even a fleeting life on earth, if dedicated to God, allows one to attain a "place of fearlessness," which is a more permanent and desirable state than the transient joys found in heavenly realms like Indra's garden.