इमं स्तवम् इत्यादिना सहस्रशाखाज्ञानेन सर्वज्ञेन भगवता कृष्णद्वैपायनेन साक्षान्नारायणेन कृतमिति सर्वैरेव अथिभिः सादरं पठितव्यं सर्वफलसिद्धय इति दर्शयति ॥
In plain words
With the words 'This hymn...' and what follows, he shows us this: it was composed by Kṛṣṇa Dvaipāyana — who holds the knowledge of all thousand branches of the Veda, who knows everything, who is Nārāyaṇa himself and not a figure of speech. And so it should be recited, with real reverence, by every single person who comes wanting something — so that every fruit may be attained.
Close to the Sanskrit
By the passage beginning 'imaṃ stavam', he shows this: that it was composed by the Blessed Kṛṣṇa Dvaipāyana — who has the knowledge of the thousand branches, who is omniscient, who is Nārāyaṇa himself — and that therefore it should be recited reverently by all seekers whatsoever, for the attainment of every fruit.