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.
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.
As fire, though one, having entered the world, becomes various according to what it burns, so does the Atman (Self) within all living beings, though one, become various according to what it enters. It also exists outside.
As air, though one, having entered the world, becomes various according to what it enters, so does the Atman within all living beings, though one, become various according to what it enters. It also exists outside.
By using these similies of fire and air, the teacher tries to show Nachiketas the subtle quality of the great Self, who, although one and formless like air and fire, yet assumes different shapes according to the form in which It dwells. But, being all-pervading and unlimited, It cannot be confined to these forms; therefore it is said that It also exists outside all forms.
As the sun, the eye of the whole world, is not defiled by external impurities seen by the eyes, thus the one inner Self of all living beings is not defiled by the misery of the world, being outside it.
The sun is called the eye of the world because it reveals all objects. As the sun may shine on the most impure object, yet remain uncontaminated by it, so the Divine Self within is not touched by the impurity or suffering of the physical form in which it dwells, the Self being beyond all bodily limitations.
XII
There is one ruler, the Self of all living beings, who makes the one form manifold; the wise who perceive Him seated within their Self, to them belongs eternal bliss, not to others.
XIII
Eternal among the changing, consciousness of the conscious, who, though one, fulfils the desires of many: the wise who perceive Him seated within their Self, to them belongs eternal peace, not to others.
XIV
They (the wise) perceive that indescribable highest bliss, saying, This is That. How am I to know It? Does It shine (by Its own light) or does It shine (by reflected light)?
The sun does not shine there, nor the moon, nor the stars; nor do these lightnings shine there, much less this fire. When He shines, everything shines after Him; by His light all is lighted.
Part Sixth
This ancient Aswattha tree has its root above and branches below. That is pure, That is Brahman, That alone is called the Immortal. All the worlds rest in That. None goes beyond That. This verily is That.
This verse indicates the origin of the tree of creation (the Samsara-Vriksha), which is rooted above in Brahman, the Supreme, and sends its branches downward into the phenomenal world. Heat and cold, pleasure and pain, birth and death, and all the shifting conditions of the mortal realm--these are the branches; but the origin of the tree, the Brahman, is eternally pure, unchanging, free and deathless. From the highest angelic form to the minutest atom, all created things have their origin in Him. He is the foundation of the universe. There is nothing beyond Him.
Whatever there is in the universe is evolved from Prana and vibrates in Prana. That is a mighty terror, like an upraised thunderbolt. They who know That become immortal.
III
From fear of Him the fire burns, from fear of Him the sun shines. From fear of Him Indra and Vayu and Death, the fifth, speed forth.
Just as the body cannot live or act without the Soul, similarly nothing in the created world can exist independent of Brahman, who is the basis of all existence. His position is like that of a king whom all must obey; hence it is said that the gods of sun, moon, wind, rain, do His bidding. He is likened to an upraised thunderbolt, because of the impartial and inevitable nature of His law, which all powers, great or small, must obey absolutely.
If a man is not able to know Him before the dissolution of the body, then he becomes embodied again in the created worlds.
As soon as a man acquires knowledge of the Supreme, he is liberated; but if he fails to attain such knowledge before his Soul is separated from the body, then he must take other bodies and return again and again to this realm of birth and death, until through varied experience he realizes the nature of the Supreme and his relation to Him.
The Upanishads · The Wunder Library — complete classics, free to read, with narration.