These are brief thoughts of mine on the various different ideas of multiple dimensions floating around out there. I have seen theories of 7 dimensions. Theories of 9 dimensions. Theories of 11 dimensions. Theories of 13 dimensions... etc. There are physics dimensional theories like the 11 or 12 dimensional models in string theory. In physics we supposedly live in a 4 dimensional world, the first 3 being spacial and the 4th being time, with speculation of additional dimensions we don't currently 'live in'. There are New age dimensional theories, and in many we are seen to be living in 3D and many think in a process of global ascension to 5D!
I definitely believe we can use these theories as metaphors for greater understanding, but I also think it's impossible for us to truly understand the dimensional constructs that exist beyond any where our consciousness is currently housed. We can grasp tentatively. We can think, hey this sounds probable, lets jump on this. However, personally, I believe that while consciousness is constrained within a dimensional limitation understanding the dynamics beyond that expanse of consciousness is always going be just our best guesses.
I find these models can be good ways of interpreting possibilities, and I believe in an infinite universe, there are infinite dimensions and systems of dimensions to be found. So I think ultimately everyone's theory is correct, however limiting yourself to that theory I think is an error in one's spiritual development.
I think when you get down to it, how one perceives the infinite universe says more about the construct of their current consciousness than the construct of the infinite universe itself which would have infinite constructs.
Then again... it's just a theory. *smile*