Shloka 18
Adhyāya 39 — त्रिगुणविवेकः (Discrimination of the Three Guṇas) and Avyakta-Doctrine
अहस्त्रिधा तु विज्ञेयं त्रिधा रात्रिविधीयते । मासार्धमासवर्षाणि ऋतव: संधयस्तथा,गुणोंके भेदसे दिनको भी तीन प्रकारका समझना चाहिये। रात भी तीन प्रकारकी होती है तथा मास, पक्ष, वर्ष, ऋतु और संध्याके भी तीन-तीन भेद होते हैं
ahastridhā tu vijñeyaṃ tridhā rātrir vidhīyate | māsārdhamāsavarṣāṇi ṛtavaḥ sandhayas tathā ||
Wika ni Vāyu: “Ang panahon ay dapat maunawaang may tatluhang paghahati: ang araw ay dapat makilalang may tatlong anyo, at ang gabi man ay inayos sa tatlong anyo. Gayundin, ang buwan, ang kalahating-buwan (fortnight), ang taon, ang mga panahon, at ang mga sandaling pag-uugnay (bukang-liwayway at dapithapon) ay binabanggit na may tig-tatlong pagkakaiba.”
वायुदेव उवाच
Educational Q&A
The verse teaches a disciplined, dharmic way of understanding time: day, night, and larger calendrical units are to be viewed through structured threefold classifications, supporting orderly conduct and ritual awareness.
Vāyudeva is instructing the listener about the taxonomy of time—how day and night, and then month/fortnight/year/seasons/twilights, are each described with threefold distinctions—framing a cosmological-ritual understanding within the discourse.