Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 3
It was a partial exteriorisation, part of the consciousness going out to the scene and surroundings described by you while the rest remained in the body and was aware both of the normal surroundings and, by communication or indirect participation, of what the other was experiencing. This is quite possible and for that no form of trance or loss of external consciousness is necessary. As for the cause of such an experience, it does not depend at all on one’s own ordinary mental or other interests; it comes by a sort of attraction or touch from someone who is there on the scene and who feels the need of sympathy, support or help of some kind, a need so strong that it forms a sort of call; it is very 
usually somebody quite unknown and it just depends on whom the call happens to touch because he is open at the time and receives the vibration and has the capacity to answer. Usually there is a sort of identification of consciousness with that of the person calling so that one can see the surroundings and the things happening through him. It is the physical that becomes nervous at these experiences and this must be overcome; as the inner mental, vital, physical consciousness opens to things behind the thick physical veil all kinds of experiences may happen that are strange to the physical mind and its tendency to be apprehensive or nervous at these things must disappear. It must be able to face even formidable things without fear.