As the embodied soul continuously passes, in this body, from boyhood to youth to old age, the soul similarly passes into another body at death. A self-realized soul is not bewildered by such a change. - Krishna to Arjuna
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The idea here is that the spark of life (individual soul) within the material body travels from one form to the next ....birth after birth. When the soul makes an honest effort to understand the meaning of life he, by the grace of the lord (super soul) situated within his own heart, may realize his spiritual form and return back to Godhead. -AJD