Adhyaya 8: Yogasthanas, Ashtanga Yoga, Pranayama-Siddhi, and Shiva-Dhyana leading to Samadhi
इति यो दशवायूनां प्राणायामेन सिध्यति प्रसादो ऽस्य तुरीया तु संज्ञा विप्राश्चतुष्टये
iti yo daśavāyūnāṃ prāṇāyāmena sidhyati prasādo 'sya turīyā tu saṃjñā viprāścatuṣṭaye
かくして、プラーナーヤーマ(調息)によって十種の生命気(ヴァーユ)を制し尽くすとき、その人の内に恩寵が現れる。賢者に説かれる四つの境地のうち、これが「第四」(トゥリーヤ)と名づけられる。
Suta Goswami (narrating Yoga teaching within the Linga Purana discourse)
It links inner discipline to Shiva’s grace: prāṇāyāma that steadies the ten vāyus generates prasāda (purity and divine favor), making the practitioner fit for Linga-upāsanā where the pashu approaches Pati with a clarified mind.
By pointing to turīya as the fruit of yogic mastery, it implies Shiva-tattva as the transcendent ‘fourth’—beyond ordinary states—realized when bondage (pāśa) is quieted and consciousness becomes lucid through grace.
Prāṇāyāma in a Pāśupata-Yoga frame—disciplining the ten vital airs—culminating in prasāda and entry into the turīya state.