Shloka 42
Brahma-vidyā: Satya–Tapas and the Enumeration of Tattvas
Arjuna–Vāsudeva framed dialogue
तस्योपायं प्रवक्ष्यामि पुरस्तात् तं निबोधत । फलमूलानिलभुजां मुनीनां वसतां वने
tasyopāyaṁ pravakṣyāmi purastāt taṁ nibodhata | phalamūlānilabhujāṁ munīnāṁ vasatāṁ vane ||
风神（Vāyu）说道：“我如今将预先宣说获得那（自我之智）的方法；你们当专心领会。诸住林之仙人，依苦行之法而住——以果与根为食，乃至以风为食——此即维系林居者（vānaprastha）之法的戒行。”
वायुदेव उवाच
Educational Q&A
Vāyu teaches that a practical ‘means’ toward self-knowledge is disciplined living aligned with āśrama-dharma—especially the forest-dweller’s path marked by simplicity, restraint, and ascetic subsistence (fruits, roots, and even air), emphasizing detachment and tapas as supports for inner realization.
Vāyudeva speaks to his listeners and announces that he will explain the method for attaining the intended goal (implied: self-knowledge). He then points to the forest-sage model of life—dwelling in the woods and living on minimal sustenance—as an exemplar of the vānaprastha/ascetic discipline.