The Prathama Valli of the Katha Upanishad begins with the story of young Nachiketa, who sees his father Vajashravasa offering decrepit cows in sacrifice. Troubled, Nachiketa asks, 'To whom will you give me?' In anger, his father replies, 'I give you to Death.' Nachiketa journeys to Yama's abode and waits three days. Yama grants three boons. For the third, Nachiketa asks about the Self after death. Yama tempts him with worldly pleasures, but Nachiketa refuses, seeking only the eternal. Yama then teaches that the senses are turned outward, but the wise look inward to perceive the immortal Self, the foundation of all perception, beyond grief and fear.
The second Valli of the Katha Upanishad describes the eternal Self dwelling in the city of the body with eleven gates (the senses). As the Hamsa (swan), the Self pervades all realms—waters, sky, earth, and fire—controlling the prana and apāna, transcending death. It is unborn, eternal, unchanging—smaller than the atom, greater than the infinite—hidden in the heart of all beings. The wise who realize this Self through discrimination and meditation overcome all sorrow and attain immortality. The Self is the highest in the hierarchy of existence, beyond body, senses, mind, and intellect.
The third Valli of the Katha Upanishad describes the eternal, inverted Ashvattha tree rooted in Brahman, from which all worlds emerge. It reveals that Fire, Sun, Wind, and Death itself operate out of awe for Brahman. The seeker must realize the Self while embodied, for failure binds one to rebirth. The Self is perceived differently across planes—mirror, dream, ancestral, Gandharva, and Brahmaloka—like reflection in water or interplay of light and shadow. The wise withdraw senses inward and meditate on Om as the bow, the Self as arrow, and Brahman as the target, attaining the immortal, fearless Absolute.
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