And this is declared by the following Rik-verse: "Let a man tell this science of Brahman to those only who have performed all (necessary) acts, who are versed in the Vedas, and firmly established in (the lower) Brahman, who themselves offer as an oblation the one Rishi (Agni), full of faith, and by whom the rite of (carrying fire on) the head has been performed, according to the rule (of the Âtharvanas)."

In plain words: A verse from the Rig Veda says who should be taught this knowledge of Brahman. It is for those who have done their duties, know the Vedas, and are steady in faith. They should make offerings to the sacred fire, called Agni, with trust and carry out the vow of carrying fire on the head, as the Atharva tradition requires.