Gargya said: 'The sound that follows a man while he moves, that I adore as Brahman.' Agatasatru said to him: 'No, no! Do not speak to me on this. I adore him verily as life.' Whoso adores him thus, he reaches his full age in this world, breath does not leave him before the time.

In plain words: Gargya says he worships the sound that follows a person as they walk as Brahman. Agatasatru says he already honors that as "life." Whoever honors it this way lives a full lifespan, and breath does not leave him too early.