A very slight shift in the perception of reality can induce a tremendous phase-shift of consciousness. This is not to say one can transit between dimensions in this state, but rather it conveys the more subtle delineation which exists between the phase-space of reality within a single dimension. The mind/sensory equipment, if you will, can be slightly attenuated in a conscious manner in order to transport one, in essence, into a different reality.
This slight change in perception is made possible due to the vast amount of information flowing freely about in our time-space dimension. The equipment we essentially inhabit here on the physical plane is tuned to a narrow and specific frequency, akin to how a radio broadcast tuner works. Since the information field is so vast and voluminous, the mind/sensory facility must filter out a tremendous amount of the information flow; to do otherwise would, frankly, lead to a short-circuiting of the equipment. In other words, our mind/sensory equipment would get fried. But, we are decidedly NOT permanently locked into the exclusive phase-space of the information flow (in fact, it is my belief that we are deliberately tuned to a specific frequency for the purposes of control; more on that topic in future posts). The only problem is that most of us simply do not know any other phase-space or frequency that that to which we have unknowingly been attuned to throughout our lives (and throughout our past lives, for that matter).