Retention of breath at will, kindling of the digestive fire, manifestation of nāda, and perfect health arise from the purification of the nāḍīs.

This verse enumerates four benefits of nāḍīśodhana (purification of the channels). First, yatheṣṭaṃ dhāraṇaṃ vāyoḥ — the ability to retain breath as desired, without effort or limits imposed by blockages in the system.

Second, analasya pradīpanam — the kindling of the digestive fire (agni). Correct prāṇāyāma stimulates metabolism, improves digestion, and eliminates accumulated toxins. This fire is not only physical but also the fire of spiritual transformation.

Third, nādābhivyakti — the manifestation of internal sound (nāda). When the nāḍīs are purified, the practitioner begins to perceive subtle internal sounds, a sign that consciousness is penetrating deeper levels. Finally, ārogya — complete health, absence of disease at all levels of being.