Why is the Earthly world considered more favorable for Self-realization than other realms like Brahmaloka, and how does this relate to overcoming greed?

According to Chapter 17, the Earthly world (Bhuloka) is uniquely suited for attaining Self-realization because it is the place where "purity of heart occurs, and the intellect becomes clear like a mirror." This pristine clarity allows the true nature of the Self to be perfectly reflected. In contrast, while Self-vision is possible in Brahmaloka, it is described as being extremely difficult and requiring immense effort. This preference for the Earthly world is directly linked to the practical struggle against attachments such as greed. It is in this physical realm that one must directly confront and overcome worldly obsessions with wealth and possessions. As Chapter 17 suggests, by destroying greed here on Earth, one achieves the necessary purity of heart that makes Self-realization possible.