When this Atman, which is seated in the body, goes out (from the body), what remains then? This verily is That.
V
No mortal lives by the in-coming breath (Prana) or by the out-going breath (Apana), but he lives by another on which these two depend.
VI
O Gautama (Nachiketas), I shall declare unto thee the secret of the eternal Brahman and what happens to the Self after death.
VII
Some Jivas (individual Souls) enter wombs to be embodied; others go into immovable forms, according to their deeds and knowledge.
This text shows the application of the law of cause and effect to all forms of life. The thoughts and actions of the present life determine the future birth and environment.
VIII
The Being who remains awake while all sleep, who grants all desires, That is pure, That is Brahman, That alone is said to be immortal. On That all the worlds rest. None goes beyond That. This verily is That.