Kaṭha Upaniṣad · 2.3.18
मृत्युप्रोक्तान्नचिकेतोऽथ लब्ध्वा विद्यामेतां योगविधिं च कृत्स्नम् । ब्रह्मप्राप्तो विरजोऽभूद्विमृत्युरन्योऽप्येवं यो विदध्यात्ममेव ॥ १८ ॥
mṛtyuproktānnaciketo'tha labdhvā vidyāmetāṃ yogavidhiṃ ca kṛtsnam | brahmaprāpto virajo'bhūdvimṛtyuranyo'pyevaṃ yo vidadhyātmameva || 18 ||
Naciketas, having obtained this knowledge declared by Death and the complete method of yoga, attained Brahman, free from stain, free from death. So also any other who thus knows the Ātman.
The dialogue reaches its conclusion. Naciketas, the young seeker, has received the vidyā (wisdom) complete and the kṛtsna yoga-vidhi (complete method of yoga) from mṛtyu (Yama, the Lord of Death). The result is brahma-prāpta (the attainment of Brahman), viraja (free from stains, from rajas, from passion), and vimṛtyu (free from death).
The promise is inclusive: not only Naciketas, but anyaḥ api (any other also) who thus knows the ātman—who realizes this truth in their own experience—will reach the same destiny. The teaching is not exclusive to one time or person; it is eternal, available to all who approach with sincerity.
For the modern yogi, this is the culmination of the path. All āsanas, all prāṇāyāmas, all meditations, point to this: to know the Ātman and thus be free. It is not a distant goal; it is the realization of what has always been. Like Naciketas, we can face death itself and emerge victorious, not by denying it, but by understanding that we have never been the one who dies.