I know this may sound weird, but I've been thinking a lot about the possibility of there being other realities parallel to this one and what would separate them from one another was the different concepts that would exist in each of them.

In this reality we have good, evil, love, hate, objectivity, subjectivity, and "all" of the concepts that exist to us. In one of these other realities we wouldn't have these concepts, but different ones. Of course, we wouldn't be able to think of these other concepts because they would only be possible to exist in the other realities.

Through this theory I came up with (don't know if anyone ever came up with this before), we wouldn't be able to know about the existence of these other realities because no concept or "thing" in them would be perceivable to us.

I'd like to know what you think about this.

PS - I'm not talking about the existence of several spiritual planes, since these would share a lot of ideas and concepts with our plane.