Could it be that the three dimensional world in which we live is not all there is to reality? Is it possible that there are other dimensions, perhaps inhabited by other beings, which, though its all around us, we are oblivious to because we lack the ability to perceive more than three dimensions?
Such a possibility was the theme of a post I did in 2006 titled
Plato's Cave for Modern Man. Check it out.
Also, check out this video which illustrates how a being possessing more dimensions than does our world would be completely incomprehensible, even though thoroughly immanent, to us:
