How does the book’s appeal reflect the socio-economic conditions of the Great Depression era?

Discuss some of Hill’s rhetorical strategies for making his “secret” both easy to understand and also seemingly supported by expertise?

Compare Hill’s more practical suggestions—that of a brain trust that meets to support one another, and that of refining one’s leadership qualities—with the supernatural conclusions each of these extends to. Why does Hill insist on the mystical powers of his ideas?