पदार्थान्वयभाषाः - हे भगवन् ! (तिस्रः, वाचः) ज्ञानप्रदकर्मप्रदोपासना-प्रदात्मकं वाक्त्रयं (प्रवद) उपदिश। (याः) या वाचः (ज्योतिः, अग्राः) उत्कर्षातिशयेन राजमानाः (एतत् ऊधः) एतन्नभोमण्डलात्मकस्तनमण्डलात् (मधुदोघम्) अमृत-स्वरूपा ओषधीः (दुहे) दुहन्ति च तथा (सः) स पर्जन्यः (वत्सम्, कृण्वन्) विद्युतमेव वत्सं कुर्वन् तथा च (ओषधीनाम्, गर्भम्) नानाविधौषधिषु गर्भं धारयन् (सद्यः, जातः) तदानीमेवोत्पद्यमानः (वृषभः) वर्षणशीलो मेघः (रोरवीति) अभीक्ष्णं शब्दायते ॥१॥

पदार्थान्वयभाषाः - Chant aloud three voices of the divine Word, Rk, Sama and Yajush verses of the four Vedas headed by the light of Divinity symbolised by the eternal Name: AUM. (They comprise the knowledge, action and prayerful gratitude of total human endeavour, the three being ‘jnana, karma and upasana.) With yajna they distil from the cosmic ocean the milky essence of liquid vitality, soma, elementary form of the cloud, parjanya. That parjanya produces the fiery electric current (here in called the calf) which then gives rise to the seed of vegetation in the form of cloud laden with living rain waters. ‘The calf’ then full grown as ‘the virile bull’ i.e., the cloud, upon the instant roars and thunders, rains and fertilises the earth with the seed of vegetation.$Note: An extension of this knowledge of the evolution of life on earth is found in the science of ‘Panchagni’, five fires, in Chhandogya Upanishad 5, 4- 9, and in Brhadaranyaka Upanish 6, 2, 9-14. Chhandogya Upanishad is an explanatory extension of parts of Sama Veda, and Brhadaranyaka Upanishad is a similar work on parts of Yajur Veda. An indication of this science is given in Kathopanishad 1, 1, 12-19. Kathopanishad is an explanatory footnote to Yajur-Veda.