Gorakhnath and the Kanphata Yogis c19.14

c19.14

1. The prāṇa is the breath,² having its chief seat in the region of the heart. It is always found in the mouth, the nose, the navel, the kanda and the great toe.³ It is the most important of all the airs and its control (prāṇāyāma) is fundamental in the Haṭha Yoga. The Upaniṣads know a single vital principle (prāṇa) which derives its existence from the self and which superintends the other functions.⁴