Imagine the cosmos, as a book. Before you sits a book, with a binded cover with the words Pondera. Inside are wondrous stories of heroes and villains, monsters and honor. But when you look closely, you find smaller bits and pieces of the story within the book.
Between each page, and the book itself, you find the transitive realms. These realms are how one travels back and forth between each page, reading and experiencing the book itself. If you look beyond the words, and into the pages themselves, one would find the elemental planes. Water from the ink, Earth, from the wood, Air and fire, from the fantasy within the imagination from the pages themselves.
However, There are other realms that one does not see. Deep between the lines of the words, far into the bindings of the pages, and in some cases, outside of the book completely. These are the divine realms, and though numerous, have many qualities about them, depending on ones point of view.