Gargya said: 'The person that consists of the shadow, that I adore as Brahman.' Agatasatru said to him: 'No, no! Do not speak to me on this. I adore him verily as death.' Whoso adores him thus, he reaches his whole age in this world, death does not approach him before the time.

In plain words: Gargya says he worships the person made of shadow as Brahman. Agatasatru says he already honors that as "death." Whoever honors it this way lives his whole lifespan, and death does not come to him before its time.