। ॥ १२ ॥
In plain words
Offer Citta, the mind, as a single oblation into Ātman, the fire that shines by its own light. Such a one is the true Agnihotrin, keeper of the sacred fire; the rest only carry the name.
Close to the Sanskrit
Into Ātman, the fire of self-luminosity, one should cast Citta—the mind—as the single oblation. That person should be known as an Agnihotrin; the others merely bear the name.