The Prana is the vital force in every being. Thought is the finest and highest action of Prana. Thought, again, as we see, is not all. There is also what we call instinct or unconscious thought, the lowest plane of action. If a mosquito stings us, our hand will strike it automatically, instinctively. This is one expression of thought. All reflex actions of the body belong to this plane of thought. There is again the other plane of thought, the conscious. I reason, I judge, I think, I see the pros and cons of certain things, yet that is not all. We know that reason is limited. Reason can go only to a certain extent, beyond that it cannot reach. The circle within which it runs is very very limited indeed. Yet at the same time, we find facts rush into this circle. Like the coming of comets certain things come into this circle; it is certain they come from outside the limit, although our reason cannot go beyond. The causes of the phenomena intruding themselves in this small limit are outside of this limit. The mind can exist on a still higher plane, the superconscious. When the mind has attained to that state, which is called Samâdhi — perfect concentration, superconsciousness — it goes beyond the limits of reason, and comes face to face with facts which no instinct or reason can ever know. All manipulations of the subtle forces of the body, the different manifestations of Prana, if trained, give a push to the mind, help it to go up higher, and become superconscious, from where it acts.