Many years ago I read about an illustrator who published a series of cartoons about the atomic bomb that was being developed concurrently under highly secretive conditions in Los Alamos, New Mexico. Alarmed, the FBI investigated him, deciding not to pull the cartoon because doing so would attract the public’s attention to the bomb even more. Evidently, the artist did not know factually of the bomb, yet the knowledge of it may well have been in what Carl Jung would call the collective unconscious. As an artist, he evidently had access to this. Art is like the dream, often a little ahead of its time. (and if you have the name of this illustrator, I would love the reference! I have been unable to locate it!)
It is not that portals have not been in literature before; they have. Any of us who read fantasy and science fiction know this. But here the issue is again: in both novels the protagonists have to recognize and then negotiate such states in order to move on in their lives. Portals may be something we as humans need to learn to negotiate in order to move on, too.
In Sacred Geography: Geomancy: Co-Creating the Earth Cosmos, author Marko Pogacnik describes interdimensional portals as “organs that make exchange between different dimensions of reality possible.” He states these are aspects of the earth that have been asleep, but due to the earth changes at hand, have reawakened. “The reappearance of Interdimensional Portals means that the unprecedented transformation of the rationally structured space-time dimension into an open multidimensional reality is at hand. (pp. 137-138).