Adhyāya 48: Brahmopadeśa on Prāṇāyāma, Sāttvika Vṛtti, and the Sattva–Kṣetrajña Question
आहुरेके च विद्वांसो ये ज्ञानपरिनिष्ठिता: । क्षेत्रज्ञसत्त्वयोरैक्यमित्येतन्नोपपद्यते,ज्ञानमें भलीभाँति स्थित कितने ही विद्वान् कहते हैं कि क्षेत्रज्ष और सत्त्वकी एकता युक्तिसंगत नहीं है
āhur eke ca vidvāṁso ye jñāna-pariniṣṭhitāḥ | kṣetrajña-sattvayor aikyam ity etan nopapadyate ||
Vāyu nói: “Có những bậc học giả, an trú vững trong tri kiến chân thật, tuyên bố rằng việc đồng nhất ‘Kẻ Biết Cánh Đồng’ (kṣetrajña—tự ngã có tri giác) với sattva (tính chất vật chất của sự trong sáng) là không thể đứng vững về mặt lý luận.”
वायुदेव उवाच
The verse asserts a key metaphysical distinction: the kṣetrajña (conscious witness/self) should not be equated with sattva (a guṇa of material nature). Even refined purity and clarity belong to prakṛti, whereas the knower is of a different order—awareness itself—so their absolute identity is argued to be untenable.
Vāyudeva is presenting a doctrinal position held by certain realized scholars: they reject the claim that the self (kṣetrajña) and the quality of sattva are one. This functions as a philosophical clarification within the Ashvamedhika Parva’s discourse setting.