In plain words
The poet, giving the sense of the Carama Śloka: The words that say the householder's way [of works] is the means of release, or else the renouncer's way [of knowledge], or any other way [devotion and the rest], are no words of authority. All good ways, and the great rites taught in the four Vedas, bear fruit through Nārāyaṇa alone. Who will say this is not so?