"The Self chooses him as his own. But he who has not first turned away from his wickedness, who is not calm and subdued, or whose mind is not at rest, he can never obtain the Self, even by knowledge. "No mortal lives by the breath that goes up and by the breath that goes down. We live by another, in whom both repose. "Well then, I shall tell thee this mystery, the eternal word (Brahman), and what happens to the _Self_, after reaching death. "Some are born again, as living beings, others enter into stocks and stones, according to their work, and according to their knowledge. "But he, the Highest Person, who wakes in us while we are asleep, shaping one lovely sight after another, he indeed is called the Light, he is called Brahman, he alone is called the Immortal. All worlds are founded on it, and no one goes beyond. _This is that._ "As the one fire, after it has entered the world, though one, becomes different according to what it burns, thus the One Self within all things, becomes different, according to whatever it enters, but it exists also apart. "As the sun, the eye of the world, is not contaminated by the external impurities seen by the eye, thus the One Self within all things is never contaminated by the sufferings of the world, being himself apart. "There is one eternal thinker, thinking non-eternal thoughts; he, though one, fulfils the desires of many. The wise who perceive Him within their Self, to them belongs eternal life, eternal peace.[341] "Whatever there is, the whole world, when gone forth (from Brahman), trembles in his breath. That Brahman is a great terror, like a drawn sword. Those who know it, become immortal. "He (Brahman) cannot be reached by speech, by mind, or by the eye. He cannot be apprehended, except by him who says, _He is._ "When all desires that dwell in the heart cease, then the mortal becomes immortal, and obtains Brahman. "When all the fetters of the heart here on earth are broken, when all that binds us to this life is undone, then the mortal becomes immortal--here my teaching ends."