Ācāra-vidhi (Rules of Conduct) — Yudhiṣṭhira’s Inquiry and Bhīṣma’s Normative Catalogue
एवं त्विह स सर्वत्र प्राणेन परिचाल्यते । पृष्ठतस्तु समानेन स्वां स्वां गतिमुपाश्रित:
evaṃ tv iha sa sarvatra prāṇena paricālyate | pṛṣṭhatas tu samānena svāṃ svāṃ gatim upāśritaḥ ||
バラドヴァージャは言った。「この身体においては、あらゆる所の働きがプラーナ(prāṇa)によって動かされる。さらにそののち、背後より、均衡の息と呼ばれるサマーナ(samāna)として、同じプラーナが—自らにふさわしい道筋を取って—身体の諸作用をそれぞれの路において統べ、支え続けるのである。」
भरद्वाज उवाच
The verse explains prāṇa as the organizing life-force that activates all bodily functions, and highlights samāna as the harmonizing aspect that regulates and sustains each function in its proper course.
Bharadvāja is describing an inner, quasi-physiological doctrine: how the vital airs operate within the embodied being, presenting prāṇa as the mover of the organs and samāna as the balancing regulator that supports their respective activities.