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 ||
婆罗陀婆阇说道:在此身中,一切处的一切机能皆由“普拉那”(prāṇa,生命气息)发动。继而,从后方以名为“萨玛那”(samāna,调衡之气)的形态,那同一普拉那——循其各自正当之行道——统摄并维系身体诸业,使其各循其路而行。
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.