'He who meditates on speech as Brahman, is, as it were, lord and master as far as speech reaches—he who meditates on speech as Brahman.' 'Sir, is there something better than speech?' 'Yes, there is something better than speech.' 'Sir, tell it me."

In plain words: Whoever honors speech as Brahman (the highest reality) has mastery as far as speech can reach. Narada asks if there is something greater than speech, and the teacher says yes.