Adhyāya 39 — त्रिगुणविवेकः (Discrimination of the Three Guṇas) and Avyakta-Doctrine
उद्रिक्तं च रजो यत्र मध्यस्रोतोगतं भवेत् । अल्पं तत्र तमो ज्ञेयं सत््वमल्पतरं तथा,मध्यस्रोता अर्थात् मनुष्ययोनिमें, जहाँ रजोगुणकी मात्रा अधिक होती है, वहाँ थोड़ा तमोगुण और बहुत थोड़ा सत्त्गगुण समझना चाहिये
udriktaṃ ca rajo yatra madhyasrotogataṃ bhavet | alpaṃ tatra tamo jñeyaṃ sattvam alpataram tathā ||
Vāyu said: In that state of existence which is called the ‘middle current’—the human condition—where the quality of passion (rajas) predominates, one should understand that darkness and inertia (tamas) are present only in a small measure, and clarity and harmony (sattva) in an even smaller measure. The teaching highlights how human life is typically driven by restless desire and activity, and therefore demands conscious ethical discipline to cultivate sattva and restrain rajas.
वायुदेव उवाच
Human life (the ‘middle current’) is typically dominated by rajas—restless desire and activity—while tamas is lesser and sattva is least. Therefore, ethical effort and self-discipline are needed to increase sattva and prevent rajas from driving one into harmful action.
Vāyu is explaining a doctrinal classification of beings by the three guṇas. He identifies the human condition as a middle realm characterized chiefly by rajas, offering a moral-psychological lens for understanding human behavior and spiritual practice.