XXIV
He who has not turned away from evil conduct, whose senses are uncontrolled, who is not tranquil, whose mind is not at rest, he can never attain this Atman even by knowledge.
Yama having first described what the Atman is, now tells us how to attain It. A man must try to subdue his lower nature and gain control over the body and senses. He must conquer the impure selfish desires which now disturb the serenity of his mind, that it may grow calm and peaceful. In other words, he must live the life and develop all spiritual qualities in order to perceive the Atman.
XXV
Who then can know where is this mighty Self? He (that Self) to whom the Brahmanas and Kshatriyas are but food and death itself a condiment.
This text proclaims the glory and majesty of the Supreme. The Brahmanas stand for spiritual strength, the Kshatriyas for physical strength, yet both are overpowered by His mightiness. Life and death alike are food for Him. As the light of the great sun swallows up all the lesser lights of the universe, similarly all worlds are lost in the effulgence of the Eternal Omnipresent Being.
Part Third
I
There are two who enjoy the fruits of their good deeds in the world, having entered into the cave of the heart, seated (there) on the highest summit. The knowers of Brahman call them shadow and light. So also (they are called) by householders who perform five fire- sacrifices or three Nachiketa fire-sacrifices.
Here the two signify the Higher Self and the lower self, dwelling in the innermost cave of the heart. The Seers of Truth, as well as householders who follow the path of rituals and outer forms with the hope of enjoying the fruits of their good deeds, both proclaim that the Higher Self is like a light and the lower self like a shadow. When the Truth shines clearly in the heart of the knower, then he surmounts the apparent duality of his nature and becomes convinced that there is but One, and that all outer manifestations are nothing but reflections or projections of that One.