The question, "What is this soul," has thus been answered by the Isha Upanishat:
"It is one, and though unmoving is swifter than mind; organs of sense cannot reach it; while standing it progresses beyond others that run; in it the life inspiration maintains the fluid forces of life."
The mind has its limitations, the sense organs are severally occupied with things that are before them, but there is a spirit of oneness in us which goes beyond the thoughts of its mind, the movements of its bodily organs, which carries whole eternity in its present moment, while through its presence the life inspiration ever urges the life forces onward. Because we are conscious of this One in us which is more than all its belongings, which outlives the death of its moments, we cannot believe that it can die. Because it is one, because it is more than its parts, because it is continual survival, perpetual overflow, we feel it beyond all boundaries of death.
This consciousness of oneness beyond all boundaries is the consciousness of soul. And of this soul Isha Upanishat has said: "It moves. It moves not. It is in the distant. It is in the near. It is within all. It is outside all."
This is to know the soul across the boundaries
