Gargya said: 'The person that is in the wind (and in the breath), that I adore as Brahman.' Agatasatru said to him: 'No, no! Do not speak to me on this. I adore him as Indra Vaikuntha, as the unconquerable army (of the Maruts).' Whoso adores him thus, becomes victorious, unconquerable, conquering his enemies.

In plain words: Gargya said he worships the person in the wind as Brahman. The king said he already honors that one as Indra, the unbeatable army of storm gods, and whoever does so wins and cannot be defeated.