Katha Upanishad: Nadis – Energy channels of the heart

The Katha-Upanishad originates from the 5th century B.C:- in this extract from chapter II. iii The discussion is about the nadis, the energy channels of the heart.

Katha-Upanishad

कठउपनिषद्

Kaṭha-Upaniṣad

Ecerpts from chapter II.iii

शतं चैका च हृदयस्य नाड्यस्तासां मूर्धनमभिनिःसृतैका ।"
तय्[आ]{ओ}[उ]र्ध्वमायन्नमृतत्वमेति"
विष्वङ्ङन्या उत्क्रमणे भवन्ति ॥१६॥
śataṁ ca-ikā ca hr̥dayasya nāḍyas-tāsāṁ mūrdhanam-abhiniḥsr̥ta-ikā ।"
tay[ā]-{o}[u]rdhvam-āyann-amr̥tatvam-eti"
viṣvaṅṅ-anyā utkramaṇe bhavanti ॥16॥
There are 101 energy channels (Nadis) of the heart existing.
One of them is directed to the skullcap. |
Through this one, reaching upwards, immortality (Amrita) can be achieved. All other channels are going to various directions - they are doors to death, exitus doorways. ||16||