We must see that consciousness is neither an isolated soul nor the mere function of a single nervous system, but of that totality of interrelated stars and galaxies which makes a nervous system possible.
Higher than the question of our duration is the question of our deserving. Immortality will come to such as are fit for it, and he would be a great soul in future must be a great soul now.
Jiva (individual soul) is the conscious ruler of this body, in whom the five life principles come into unity, and yet that very Jiva is the Atman, because all is Atman.
The seat of the soul and the control of voluntary movement - in fact, of nervous functions in general, - are to be sought in the heart. The brain is an organ of minor importance.