In many Eastern philosophies there is the teaching that there are realizations that simply cannot be grasped by thinking. What this means is that, while our physical brains are very effective at operating our bodies and interacting with others in our ordinary consciousness, they balk at realizations of a reality beyond the confines of the physical world. It is only by bringing certain types of energy within the body to critical mass that we are able to make the leaps of awareness into what is often referred to as "enlightenment." This is a type of naturally occurring energy that is capable of sustaining consciousness outside of our physical bodies.
There are many maps for this process. The Chinese map of QiGong is quite an effective one, as is the map of raising kundalini to shakti. This same process shows up in my shamanic map as the Medicine Body. This is simply the human aura brought to a conscious level of awareness. When we build up this conscious energy and begin to think outside the body, a great many things become obvious that would have seemed impossible before.