'He who knowing this meditates on him, destroys sin, obtains the world (of Agni Âhavanîya), reaches his full age, and lives long; his descendants do not perish. We guard him in this world and in the other, whosoever knowing this meditates on him.'
In plain words: Whoever knows this and meditates on it is freed from wrongdoing, lives long, and his family continues. The fires protect him in this world and the next.